[sdnog] Weekly Routing Table Report

Yousra Abdalla yousra.a.nasr at gmail.com
Wed Nov 13 12:40:45 SAST 2019


On Wed, Nov 13, 2019, 13:28 Ala Eldin Rifat / Quantum <a.rifat at q-ab.com>
wrote:

> Dears,,
>
>
>
> ·         It’s nice to ask questions kindly for more details,
> Clarification even just to get the Basic concept about something, pushed  by
> intention of knowing, also to response, answer the questions gently too..
>
> ·         such interactions is one of the main purpose of the mailing
> list.
>
> ·         Some discussions may  not be interested, related to someone,
> but that not mean It’s not useful totally
>
******************************

> -          The reminder or the update of the weekly routing report is
> very important for me J
>
Ok good,,,can you please tell me WHY ? Maybe by simple example ? This what
I wanted to understand

Thanks in advance ..
*******************************

> ·         We’re looking for more positive discussions, initiatives and  collaboration
> in our Mailing list ..
>
>
>
>
>
>
>
>
>
> Best Regards
>
>
>
>
>
> [image: Description: Logo #]
>
> Ala Eldin Rifat
>
> Block-4, Building-7
> Khartoum South, Sudan
>
> Mobile : +249912123099
>
> Email : a.rifat at q-ab.com
>
> Web : www.q-ab.com
>
>
>
> *From:* sdnog [mailto:sdnog-bounces at sdnog.sd] *On Behalf Of *Yousra
> Abdalla
> *Sent:* Tuesday, November 12, 2019 5:07 PM
> *To:* Samir Abdullatif
> *Cc:* Sudan NOG
> *Subject:* Re: [sdnog] Weekly Routing Table Report
>
>
>
> @Ahmed
>
>  you said the opposite ..the main objective of the list is to discuss and
> share knowledge  ...getting updates and announcements is just part of it ..
>
> So ...calm down dear ..and enjoy the discussion!
>
>
>
> @Samir
>
>  thanks for the details ..as you mentioned I still need an example to
> understand at least one use of it.
>
>
>
> @philip
>
>
>
> "The global routing system affects us all, and has big impacts on our
> local network infrastructure too."
>
> Can you please explain more how's that?
>
>
>
> On Tue, Nov 12, 2019, 17:01 Samir Abdullatif <samir.s.omer at hotmail.com>
> wrote:
>
> Salam Yousra
>
>
>
> As you might be aware When an ISP or Autonomous System (AS) acquires a
> block of globally unique IP addresses (called a prefix), it must advertise
> it to the world  (the global Internet routing table). This advertisement is
> needed in order to let all other ASes in the world know how to find out
> that the new prefix, and where to send any IP packets destined for it.
>
> One insight you will can find from such report is that you are going to
> notice the number of prefixes in the global internet routing table is
>  always increasing. Of course one reason of this increase  is the natural
> internet growth, however there is another reason more important to use
> network engineers  is that ISPs often break down their prefixes into more
> smaller  subnets and advertise them (like breaking down a /20 into multiple
> /22).  typically an ISP should aggregate their prefixes into bigger blocks
> rather than de-aggregating them.
>
>
>
> Such information  can be found in the report by by (No of nets/prefixes
> and MaxAgg).
>
>
>
> This is one example of course you can find more insight by going through
> the report documentation on the website.
>
> And if anyone on the list can share a story of or use case where the
> report helped him please share it with us.
>
>
>
>
>
> --
>
> Samir
>
>
>
>
> On Nov 11, 2019, at 11:25 AM, Yousra Abdalla <yousra.a.nasr at gmail.com>
> wrote:
>
> What is this weekly routing table report for? What the benefits of it?
>
> On Fri, Nov 8, 2019, 21:05 Routing Analysis Role Account <cscora at apnic.net>
> wrote:
> This is an automated weekly mailing describing the state of the Internet
> Routing Table as seen from APNIC's router in Japan.
>
> The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
> TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.
>
> Daily listings are sent to bgp-stats at lists.apnic.net
>
> For historical data, please see http://thyme.rand.apnic.net.
>
> If you have any comments please contact Philip Smith <pfsinoz at gmail.com>.
>
> Routing Table Report   04:00 +10GMT Sat 09 Nov, 2019
>
> Report Website:     http://thyme.rand.apnic.net
> Detailed Analysis:  http://thyme.rand.apnic.net/current/
>
> Analysis Summary
> ----------------
>
> BGP routing table entries examined:                              781783
>     Prefixes after maximum aggregation (per Origin AS):          297937
>     Deaggregation factor:                                          2.62
>     Unique aggregates announced (without unneeded subnets):      376869
> Total ASes present in the Internet Routing Table:                 66078
>     Prefixes per ASN:                                             11.83
> Origin-only ASes present in the Internet Routing Table:           56797
> Origin ASes announcing only one prefix:                           24298
> Transit ASes present in the Internet Routing Table:                9281
> Transit-only ASes present in the Internet Routing Table:            268
> Average AS path length visible in the Internet Routing Table:       4.4
>     Max AS path length visible:                                      35
>     Max AS path prepend of ASN ( 44555)                              27
> Prefixes from unregistered ASNs in the Routing Table:                27
>     Number of instances of unregistered ASNs:                        27
> Number of 32-bit ASNs allocated by the RIRs:                      29439
> Number of 32-bit ASNs visible in the Routing Table:               24053
> Prefixes from 32-bit ASNs in the Routing Table:                  109264
> Number of bogon 32-bit ASNs visible in the Routing Table:            11
> Special use prefixes present in the Routing Table:                    0
> Prefixes being announced from unallocated address space:            360
> Number of addresses announced to Internet:                   2841827200
>     Equivalent to 169 /8s, 98 /16s and 215 /24s
>     Percentage of available address space announced:               76.8
>     Percentage of allocated address space announced:               76.8
>     Percentage of available address space allocated:              100.0
>     Percentage of address space in use by end-sites:               99.4
> Total number of prefixes smaller than registry allocations:      260296
>
> APNIC Region Analysis Summary
> -----------------------------
>
> Prefixes being announced by APNIC Region ASes:                   209880
>     Total APNIC prefixes after maximum aggregation:               60956
>     APNIC Deaggregation factor:                                    3.44
> Prefixes being announced from the APNIC address blocks:          204135
>     Unique aggregates announced from the APNIC address blocks:    84988
> APNIC Region origin ASes present in the Internet Routing Table:   10169
>     APNIC Prefixes per ASN:                                       20.07
> APNIC Region origin ASes announcing only one prefix:               2827
> APNIC Region transit ASes present in the Internet Routing Table:   1512
> Average APNIC Region AS path length visible:                        4.6
>     Max APNIC Region AS path length visible:                         25
> Number of APNIC region 32-bit ASNs visible in the Routing Table:   5183
> Number of APNIC addresses announced to Internet:              771228032
>     Equivalent to 45 /8s, 248 /16s and 1 /24s
> APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
> (pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
>                        58368-59391, 63488-64098, 64297-64395, 131072-141625
> APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
>                         49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
>                        106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
>                        116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
>                        123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
>                        163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
>                        203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
>                        222/8, 223/8,
>
> ARIN Region Analysis Summary
> ----------------------------
>
> Prefixes being announced by ARIN Region ASes:                    230178
>     Total ARIN prefixes after maximum aggregation:               106890
>     ARIN Deaggregation factor:                                     2.15
> Prefixes being announced from the ARIN address blocks:           227726
>     Unique aggregates announced from the ARIN address blocks:    108693
> ARIN Region origin ASes present in the Internet Routing Table:    18642
>     ARIN Prefixes per ASN:                                        12.22
> ARIN Region origin ASes announcing only one prefix:                6925
> ARIN Region transit ASes present in the Internet Routing Table:    1921
> Average ARIN Region AS path length visible:                         3.9
>     Max ARIN Region AS path length visible:                          24
> Number of ARIN region 32-bit ASNs visible in the Routing Table:    2989
> Number of ARIN addresses announced to Internet:              1069086720
>     Equivalent to 63 /8s, 184 /16s and 248 /24s
> ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
> (pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
>                        3354-4607, 4865-5119, 5632-6655, 6912-7466
>                        7723-8191, 10240-12287, 13312-15359, 16384-17407
>                        18432-20479, 21504-23551, 25600-26591,
>                        26624-27647, 29696-30719, 31744-33791
>                        35840-36863, 39936-40959, 46080-47103
>                        53248-55295, 62464-63487, 64198-64296, 393216-399260
> ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
>                         12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
>                         20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
>                         29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
>                         40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
>                         54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
>                         66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
>                         73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
>                         99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
>                        130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
>                        138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
>                        147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
>                        158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
>                        166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
>                        174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
>                        206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
>
>
> RIPE Region Analysis Summary
> ----------------------------
>
> Prefixes being announced by RIPE Region ASes:                    218407
>     Total RIPE prefixes after maximum aggregation:               102481
>     RIPE Deaggregation factor:                                     2.13
> Prefixes being announced from the RIPE address blocks:           214977
>     Unique aggregates announced from the RIPE address blocks:    127753
> RIPE Region origin ASes present in the Internet Routing Table:    26583
>     RIPE Prefixes per ASN:                                         8.09
> RIPE Region origin ASes announcing only one prefix:               11704
> RIPE Region transit ASes present in the Internet Routing Table:    3749
> Average RIPE Region AS path length visible:                         4.5
>     Max RIPE Region AS path length visible:                          34
> Number of RIPE region 32-bit ASNs visible in the Routing Table:    8644
> Number of RIPE addresses announced to Internet:               722427648
>     Equivalent to 43 /8s, 15 /16s and 95 /24s
> RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
> (pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
>                        6656-6911, 8192-9215, 12288-13311, 15360-16383
>                        20480-21503, 24576-25599, 28672-29695
>                        30720-31743, 33792-35839, 38912-39935
>                        40960-45055, 47104-52223, 56320-58367
>                        59392-61439, 61952-62463, 64396-64495
>                        196608-210331
> RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
>                         62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
>                         83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
>                         90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
>                        141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
>                        193/8, 194/8, 195/8, 212/8, 213/8, 217/8,
>
> LACNIC Region Analysis Summary
> ------------------------------
>
> Prefixes being announced by LACNIC Region ASes:                  101615
>     Total LACNIC prefixes after maximum aggregation:              23220
>     LACNIC Deaggregation factor:                                   4.38
> Prefixes being announced from the LACNIC address blocks:         102745
>     Unique aggregates announced from the LACNIC address blocks:   44941
> LACNIC Region origin ASes present in the Internet Routing Table:   9067
>     LACNIC Prefixes per ASN:                                      11.33
> LACNIC Region origin ASes announcing only one prefix:              2369
> LACNIC Region transit ASes present in the Internet Routing Table:  1715
> Average LACNIC Region AS path length visible:                       5.3
>     Max LACNIC Region AS path length visible:                        35
> Number of LACNIC region 32-bit ASNs visible in the Routing Table:  6620
> Number of LACNIC addresses announced to Internet:             173949696
>     Equivalent to 10 /8s, 94 /16s and 67 /24s
> LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
>                        61440-61951, 64099-64197, 262144-270748 + ERX
> transfers
> LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
>                        191/8, 200/8, 201/8,
>
> AfriNIC Region Analysis Summary
> -------------------------------
>
> Prefixes being announced by AfriNIC Region ASes:                  21675
>     Total AfriNIC prefixes after maximum aggregation:              4368
>     AfriNIC Deaggregation factor:                                  4.96
> Prefixes being announced from the AfriNIC address blocks:         31840
>     Unique aggregates announced from the AfriNIC address blocks:  10190
> AfriNIC Region origin ASes present in the Internet Routing Table:  1334
>     AfriNIC Prefixes per ASN:                                     23.87
> AfriNIC Region origin ASes announcing only one prefix:              473
> AfriNIC Region transit ASes present in the Internet Routing Table:  260
> Average AfriNIC Region AS path length visible:                      4.9
>     Max AfriNIC Region AS path length visible:                       23
> Number of AfriNIC region 32-bit ASNs visible in the Routing Table:  617
> Number of AfriNIC addresses announced to Internet:            104797440
>     Equivalent to 6 /8s, 63 /16s and 21 /24s
> AfriNIC AS Blocks      36864-37887, 327680-328703 & ERX transfers
> AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
>
>
> APNIC Region per AS prefix count summary
> ----------------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>   7545         5091        630     590  TPG-INTERNET-AP TPG Telecom
> Limited, AU
>   4538         4681       4192      73  ERX-CERNET-BKB China Education and
> Rese
>   7552         3265       1331      27  VIETEL-AS-AP Viettel Group, VN
>  45899         3082       1772     108  VNPT-AS-VN VNPT Corp, VN
>   7713         2712        799     489  TELKOMNET-AS-AP PT Telekomunikasi
> Indon
>   9808         2615       9043      63  CMNET-GD Guangdong Mobile
> Communication
>   9829         2531       1495     530  BSNL-NIB National Internet
> Backbone, IN
>   4766         2384      11113     665  KIXS-AS-KR Korea Telecom, KR
>   9498         2203        433     211  BBIL-AP BHARTI Airtel Ltd., IN
>   4755         2149        442     196  TATACOMM-AS TATA Communications
> formerl
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC
>
> ARIN Region per AS prefix count summary
> ---------------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>   7155         4055        280      27  VIASAT-SP-BACKBONE - ViaSat,Inc.,
> US
>  11492         3753        247     674  CABLEONE - CABLE ONE, INC., US
>  16509         3633       7375    1570  AMAZON-02 - Amazon.com, Inc., US
>  22773         3496       2970     155  ASN-CXA-ALL-CCI-22773-RDC - Cox
> Communi
>   6327         3357       1324      93  SHAW - Shaw Communications Inc., CA
>  16625         2900       1534    2070  AKAMAI-AS - Akamai Technologies,
> Inc.,
>  30036         2239        354     121  MEDIACOM-ENTERPRISE-BUSINESS -
> Mediacom
>  20115         2134       2769     517  CHARTER-20115 - Charter
> Communications,
>    209         2114       5070     533  CENTURYLINK-US-LEGACY-QWEST -
> CenturyLi
>  18566         2068        405     103  MEGAPATH5-US - MegaPath
> Corporation, US
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN
>
> RIPE Region per AS prefix count summary
> ---------------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>  12479         5639       1618     136  UNI2-AS, ES
>  39891         4034        219      19  ALJAWWALSTC-AS, SA
>   8551         2980        379      46  BEZEQ-INTERNATIONAL-AS Bezeqint
> Interne
>  20940         2796        475    1965  AKAMAI-ASN1, US
>  31334         2630        484      13  KABELDEUTSCHLAND-AS, DE
>  12389         2418       2234     698  ROSTELECOM-AS, RU
>   9121         2155       1691      18  TTNET, TR
>  34984         2153        349     536  TELLCOM-AS, TR
>   9009         1927        207    1055  M247, GB
>  13188         1604        100      47  TRIOLAN, UA
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE
>
> LACNIC Region per AS prefix count summary
> -----------------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>   8151         6224       3330     612  Uninet S.A. de C.V., MX
>  10620         3355        532     466  Telmex Colombia S.A., CO
>  11830         2697        370      54  Instituto Costarricense de
> Electricidad
>   6503         1688        327     387  Axtel, S.A.B. de C.V., MX
>   7303         1477       1024     275  Telecom Argentina S.A., AR
>  28573         1202       2232     195  CLARO S.A., BR
>  13999         1114        486     244  Mega Cable, S.A. de C.V., MX
>   6147         1103        380      37  Telefonica del Peru S.A.A., PE
>   3816         1086        556     135  COLOMBIA TELECOMUNICACIONES S.A.
> ESP, C
>  11172          934        110      59  Alestra, S. de R.L. de C.V., MX
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC
>
> AfriNIC Region per AS prefix count summary
> ------------------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>  24863         1175        393      23  LINKdotNET-AS, EG
>  36992         1021       1535      73  ETISALAT-MISR, EG
>  24835          959        618      25  RAYA-AS, EG
>  36903          868        438      95  MT-MPLS, MA
>   8452          642       1857      19  TE-AS TE-AS, EG
>   6713          626       1863      34  IAM-AS, MA
>  29571          522         68      11  ORANGE-COTE-IVOIRE, CI
>  37342          482         32       1  MOVITEL, MZ
>  15399          410         45      10  WANANCHI-, KE
>  23889          366        231      15  MauritiusTelecom, MU
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC
>
> Global Per AS prefix count summary
> ----------------------------------
>
>    ASN   No of nets  /20 equiv  MaxAgg  Description
>   8151         6224       3330     612  Uninet S.A. de C.V., MX
>  12479         5639       1618     136  UNI2-AS, ES
>   7545         5091        630     590  TPG-INTERNET-AP TPG Telecom
> Limited, AU
>   4538         4681       4192      73  ERX-CERNET-BKB China Education and
> Rese
>   7155         4055        280      27  VIASAT-SP-BACKBONE - ViaSat,Inc.,
> US
>  39891         4034        219      19  ALJAWWALSTC-AS, SA
>  11492         3753        247     674  CABLEONE - CABLE ONE, INC., US
>  16509         3633       7375    1570  AMAZON-02 - Amazon.com, Inc., US
>  22773         3496       2970     155  ASN-CXA-ALL-CCI-22773-RDC - Cox
> Communi
>   6327         3357       1324      93  SHAW - Shaw Communications Inc., CA
>
> Complete listing at http://thyme.rand.apnic.net/current/data-ASnet
>
> Global Per AS Maximum Aggr summary
> ----------------------------------
>
>   ASN   No of nets  Net Savings  Description
>  12479       5639         5503   UNI2-AS, ES
>   4538       4681         4608   ERX-CERNET-BKB China Education and
> Research Net
>   7545       5091         4501   TPG-INTERNET-AP TPG Telecom Limited, AU
>   7155       4055         4028   VIASAT-SP-BACKBONE - ViaSat,Inc., US
>  39891       4034         4015   ALJAWWALSTC-AS, SA
>  22773       3496         3341   ASN-CXA-ALL-CCI-22773-RDC - Cox
> Communications
>   6327       3357         3264   SHAW - Shaw Communications Inc., CA
>   7552       3265         3238   VIETEL-AS-AP Viettel Group, VN
>  11492       3753         3079   CABLEONE - CABLE ONE, INC., US
>  45899       3082         2974   VNPT-AS-VN VNPT Corp, VN
>
> Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet
>
> List of Unregistered Origin ASNs (Global)
> -----------------------------------------
>
> Bad AS    Designation  Network              Transit AS  Description
>  230105   UNALLOCATED  38.110.79.0/24       23015       CMC180-TOR-AS -
> Cambridge Merc
>   64501   DOCUMENT     45.174.25.0/24      267817       UNKNOWN
>  260984   UNALLOCATED  45.175.186.0/23      16735       ALGAR TELECOM
> S/A, BR
>  266842   UNALLOCATED  45.238.156.0/22     265680       HNTELCO S.A, HN
>   65550   DOCUMENT     81.8.34.0/24         15924
> BORUSANTELEKOM-AS, TR
>   65550   DOCUMENT     81.8.35.0/24         15924
> BORUSANTELEKOM-AS, TR
>   64339   UNALLOCATED  143.0.108.0/22       18747       IFX18747 - IFX
> Corporation, US
>   64355   UNALLOCATED  156.40.196.0/24      30387       NIH-NET-NCCS -
> National Instit
>   64011   UNALLOCATED  166.133.128.0/18     20057
> ATT-MOBILITY-LLC-AS20057 - AT&
>   64011   UNALLOCATED  166.133.192.0/18     20057
> ATT-MOBILITY-LLC-AS20057 - AT&
>
> Complete listing at http://thyme.rand.apnic.net/current/data-badAS
>
> Advertised Unallocated Addresses
> --------------------------------
>
> Network            Origin AS  Description
> 23.136.224.0/24      15206    6X7 - 6x7 Networks LLC, ZZ
> 27.100.7.0/24        56096    UNKNOWN
> 27.126.156.0/22      55827    UNKNOWN
> 27.126.156.0/23      55827    UNKNOWN
> 27.126.158.0/23      55827    UNKNOWN
> 31.217.248.0/23     209372    IPMEN, GB
> 31.217.250.0/23     209372    IPMEN, GB
> 31.217.252.0/23     209372    IPMEN, GB
> 31.217.254.0/23     209372    IPMEN, GB
> 37.77.148.0/23      209372    IPMEN, GB
>
> Complete listing at http://thyme.rand.apnic.net/current/data-add-IANA
>
> Number of prefixes announced per prefix length (Global)
> -------------------------------------------------------
>
>  /1:0        /2:0        /3:0        /4:0        /5:0        /6:0
>  /7:0        /8:10       /9:11      /10:38      /11:100     /12:290
> /13:577     /14:1159    /15:1921    /16:13314   /17:8089    /18:13796
> /19:25732   /20:40311   /21:47338   /22:97473   /23:79192   /24:450872
> /25:1560    /26:0       /27:0       /28:0       /29:0       /30:0
> /31:0       /32:0
>
> Advertised prefixes smaller than registr
>
>
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