[apops] The CIDR Report
This report has been generated at Fri Apr 23 21:14:39 2021 AEST. The report analyses the eBGP Routing Table at AS131072 and generates a report on aggregation potential within the table. Check https://www.cidr-report.org/2.0 for a current version of this report. Recent Table History Date PrefixesCIDR Agg 16-04-21877233 480456 17-04-21877525 480458 18-04-21877162 480393 19-04-21877554 469512 20-04-21877283 470591 21-04-21877679 474122 22-04-21878075 474793 23-04-21877839 475522 AS Summary 71349 Number of ASes in routing system 25098 Number of ASes announcing only one prefix 8518 Largest number of prefixes announced by an AS AS8151 : Uninet S.A. de C.V., MX 178315520 Largest address span announced by an AS (/32s) AS8003 : GRS-DOD, US Aggregation Summary The algorithm used in this report proposes aggregation only when there is a precise match using the AS path, so as to preserve traffic transit policies. Aggregation is also proposed across non-advertised address space ('holes'). --- 23Apr21 --- ASnumNetsNow NetsAggr NetGain % Gain Description Table 878462 475622 40284045.9% All ASes AS8151 8518 2182 633674.4% Uninet S.A. de C.V., MX AS9808 6487 1006 548184.5% CMNET-GD Guangdong Mobile Communication Co.Ltd., CN AS12479 6499 1257 524280.7% UNI2-AS, ES AS7545 5728 726 500287.3% TPG-INTERNET-AP TPG Telecom Limited, AU AS47331 7796 3513 428354.9% TTNET, TR AS7155 4030 155 387596.2% VIASAT-SP-BACKBONE, US AS7713 3524 62 346298.2% TELKOMNET-AS-AP PT Telekomunikasi Indonesia, ID AS7552 3481 110 337196.8% VIETEL-AS-AP Viettel Group, VN AS22773 3931 575 335685.4% ASN-CXA-ALL-CCI-22773-RDC, US AS39891 3266 42 322498.7% ALJAWWALSTC-AS, SA AS8551 3639 695 294480.9% BEZEQ-INTERNATIONAL-AS Bezeqint Internet Backbone, IL AS6327 3359 500 285985.1% SHAW, CA AS4538 4763 2223 254053.3% ERX-CERNET-BKB China Education and Research Network Center, CN AS11492 4752 2561 219146.1% CABLEONE, US AS16509 5038 3029 200939.9% AMAZON-02, US AS9498 2336 386 195083.5% BBIL-AP BHARTI Airtel Ltd., IN AS7303 2057 120 193794.2% Telecom Argentina S.A., AR AS12389 2905 1025 188064.7% ROSTELECOM-AS, RU AS45899 3381 1543 183854.4% VNPT-AS-VN VNPT Corp, VN AS9394 1779 40 173997.8% CTTNET China TieTong Telecommunications Corporation, CN AS45090 2098 397 170181.1% CNNIC-TENCENT-NET-AP Shenzhen Tencent Computer Systems Company Limited, CN AS4766 2435 770 166568.4% KIXS-AS-KR Korea Telecom, KR AS18403 1723 62 166196.4% FPT-AS-AP The Corporation for Financing & Promoting Technology, VN AS4755 2119 536 158374.7% TATACOMM-AS TATA Communications formerly VSNL is Leading ISP, IN AS18566 1992 464 152876.7% MEGAPATH5-, US AS209 2533 1116 141755.9% CENTURYLINK-US-LEGACY-QWEST, US AS11830 2494 1148 134654.0% Instituto Costarricense de Electricidad y Telecom., CR AS24560 1746 450 129674.2% AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services, IN AS13588 11717 116499.4% TELSTRA-BELONG-AP Belong (Telstra Corporation), AU AS23969 1947 795 115259.2% TOT-NET TOT Public Company Limited, TH Total 107527274958003274.4% Top 30 total Possible Bogus Routes 23.135.192.0/23 AS39652 DSC-ASN-1, CA 23.141.0.0/24AS39535 -Reserved AS-,
[apops] The CIDR Report
This report has been generated at Fri Apr 23 21:45:52 2021 AEST. The report analyses the BGP Routing Table as seen within AS131072 and generates a report on aggregation potential within the table. Check https://www.cidr-report.org/v6 for a current version of this report. Recent Table History Date PrefixesCIDR Agg 16-04-21120598 63802 17-04-21120835 63810 18-04-21120761 63843 19-04-21120944 61571 20-04-21121023 61674 21-04-21121067 61742 22-04-21121089 61492 23-04-21121429 61492 AS Summary 22372 Number of ASes in routing system 13873 Number of ASes announcing only one prefix 2979 Largest number of prefixes announced by an AS AS11172: Alestra, S. de R.L. de C.V., MX 36318243520512 (/18.95) Largest address span announced by an AS (/64s) AS7922 : COMCAST-7922, US Aggregation Summary The algorithm used in this report proposes aggregation only when there is a precise match using the AS path, so as to preserve traffic transit policies. --- 23Apr21 --- ASnumNetsNow NetsAggr NetGain % Gain Description Table 121666616156005149.4% All ASes AS11172 2979 119 286096.0% Alestra, S. de R.L. de C.V., MX AS7552 2033 17 201699.2% VIETEL-AS-AP Viettel Group, VN AS17622 2324 459 186580.2% CNCGROUP-GZ China Unicom Guangzhou network, CN AS45609 2127 341 178684.0% BHARTI-MOBILITY-AS-AP Bharti Airtel Ltd. AS for GPRS Service, IN AS9808 2192 582 161073.4% CMNET-GD Guangdong Mobile Communication Co.Ltd., CN AS12479 15324 152899.7% UNI2-AS, ES AS24547 1516 171 134588.7% CMNET-V4HEBEI-AS-AP Hebei Mobile Communication Company Limited, CN AS45271 1376 133 124390.3% ICLNET-AS-AP Idea Cellular Limited, IN AS22773 1232 10 122299.2% ASN-CXA-ALL-CCI-22773-RDC, US AS28573 1216 139 107788.6% CLARO S.A., BR AS56046 1060 13 104798.8% CMNET-JIANGSU-AP China Mobile communications corporation, CN AS39891 7939 78498.9% ALJAWWALSTC-AS, SA AS4808 821 89 73289.2% CHINA169-BJ China Unicom Beijing Province Network, CN AS18403 866 135 73184.4% FPT-AS-AP The Corporation for Financing & Promoting Technology, VN AS32098 837 108 72987.1% TRANSTELCO-INC, US AS62240 742 38 70494.9% CLOUVIDER Clouvider - Global ASN, GB AS16509 1528 868 66043.2% AMAZON-02, US AS33363 691 49 64292.9% BHN-33363, US AS38266 837 230 60772.5% VODAFONE-IN Vodafone India Ltd., IN AS56044 656 55 60191.6% CMNET-AS-LIAONING China Mobile communications corporation, CN AS56047 630 40 59093.7% CMNET-HUNAN-AP China Mobile communications corporation, CN AS20115 597 109 48881.7% CHARTER-20115, US AS4134 526 40 48692.4% CHINANET-BACKBONE No.31,Jin-rong Street, CN AS30036 592 170 42271.3% MEDIACOM-ENTERPRISE-BUSINESS, US AS17552 413 14 39996.6% TRUEONLINE-AS-AP True Online, TH AS13361 573 207 36663.9% VODAFONE-AS-AP Vodafone Australia Pty Ltd, AU AS56041 378 31 34791.8% CMNET-ZHEJIANG-AP China Mobile communications corporation, CN AS8376 445 100 34577.5% Jordan Data Communications, JO AS13142 403 59 34485.4% MOBIFONE-AS-VN MOBIFONE Corpora
[apops] IPv6 BGP Update Report
IPv6 BGP Update Report Interval: 08-Apr-21 -to- 22-Apr-21 (14 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASNUpds % Upds/PfxAS-Name 1 - AS270590 706227 13.0% 21400.8 -- M Andrade dos Santos, BR 2 - AS131429 451476 8.3%1169.6 -- MOBIFONE-AS-VN MOBIFONE Corporation, VN 3 - AS18403300753 5.5%1779.6 -- FPT-AS-AP The Corporation for Financing & Promoting Technology, VN 4 - AS24173280594 5.2%1087.6 -- NETNAM-AS-AP Netnam Company, VN 5 - AS33363217323 4.0% 312.2 -- BHN-33363, US 6 - AS27951128923 2.4%2527.9 -- Media Commerce Partners S.A, CO 7 - AS20473116859 2.1% 244.5 -- AS-CHOOPA, US 8 - AS28573116692 2.1% 92.0 -- CLARO S.A., BR 9 - AS267560 104552 1.9% 14936.0 -- PC CONNECT TELECOMUNICACOES LTDA, BR 10 - AS24429103373 1.9% 11485.9 -- TAOBAO Zhejiang Taobao Network Co.,Ltd, CN 11 - AS20590897579 1.8% 16263.2 -- PETERCXY-NETWORKS PeterCxy Networks, DE 12 - AS9558 65796 1.2% 10966.0 -- PRIMECROWN-AS-IN PrimeCrown Technologies Private Limited, IN 13 - AS60626 62756 1.2% 15689.0 -- LEASEWEBCDN, NL 14 - AS9829 62261 1.1% 149.7 -- BSNL-NIB National Internet Backbone, IN 15 - AS19551 62118 1.1% 112.9 -- INCAPSULA, US 16 - AS47377 60926 1.1%3206.6 -- ORANGE_BELGIUM_SA New company name is Orange Belgium SA, BE 17 - AS38266 60654 1.1% 72.5 -- VODAFONE-IN Vodafone India Ltd., IN 18 - AS26869851902 1.0%5766.9 -- CONNECTCEU TELECOM EIRELI, BR 19 - AS13644047459 0.9% 47459.0 -- SASPL-AS-AP Sungard Availability Services (India) Private Limited, IN 20 - AS26726446899 0.9%6699.9 -- Jrfiber servicos de comunicacao, BR TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASNUpds % Upds/PfxAS-Name 1 - AS13644047459 0.9% 47459.0 -- SASPL-AS-AP Sungard Availability Services (India) Private Limited, IN 2 - AS26925635432 0.7% 35432.0 -- INFOLINK INTERNET EIRELI, BR 3 - AS26639033511 0.6% 33511.0 -- Tajo Tecnologia Ltda, BR 4 - AS26763826692 0.5% 26692.0 -- Wind Telecomunicacao do Brasil Ltda - ME, BR 5 - AS270590 706227 13.0% 21400.8 -- M Andrade dos Santos, BR 6 - AS15405 21088 0.4% 21088.0 -- EASTCORK-AS, IE 7 - AS31514 39096 0.7% 19548.0 -- INF-NET-AS, RU 8 - AS33110 19159 0.3% 19159.0 -- UHSC-MBC, CA 9 - AS26827517960 0.3% 17960.0 -- GOOD TELECOM PROVEDOR DE INTERNET LTDA, BR 10 - AS20590897579 1.8% 16263.2 -- PETERCXY-NETWORKS PeterCxy Networks, DE 11 - AS60626 62756 1.2% 15689.0 -- LEASEWEBCDN, NL 12 - AS37495 15684 0.3% 15684.0 -- Eko-Konnect, NG 13 - AS13714431308 0.6% 15654.0 -- PASSLIR-AS Passit Media And Communication Pvt. Ltd., IN 14 - AS267560 104552 1.9% 14936.0 -- PC CONNECT TELECOMUNICACOES LTDA, BR 15 - AS13972114484 0.3% 14484.0 -- CHINATELECOM-ANHUI-HEFEI-MAN HeFei, CN 16 - AS16331 14237 0.3% 14237.0 -- TELE-ENTRE-FI-AS, FI 17 - AS24429103373 1.9% 11485.9 -- TAOBAO Zhejiang Taobao Network Co.,Ltd, CN 18 - AS20878911341 0.2% 11341.0 -- SENAT-AS, FR 19 - AS9558 65796 1.2% 10966.0 -- PRIMECROWN-AS-IN PrimeCrown Technologies Private Limited, IN 20 - AS50888 9906 0.2%9906.0 -- MINOTAUR-ASN, GB TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 2404:2280:147::/ 48688 0.8% AS24429 -- TAOBAO Zhejiang Taobao Network Co.,Ltd, CN 2 - 2400:dc40::/3247459 0.8% AS136440 -- SASPL-AS-AP Sungard Availability Services (India) Private Limited, IN 3 - 2404:2280:106::/ 40472 0.7% AS24429 -- TAOBAO Zhejiang Taobao Network Co.,Ltd, CN 4 - 2405:4000:800:8: 40075 0.7% AS38082 -- IIT-TIG-AS-AP True International Gateway Co., Ltd., TH 5 - 2804:61c8::/3235432 0.6% AS269256 -- INFOLINK INTERNET EIRELI, BR 6 - 2804:371c:8000:: 33511 0.6% AS266390 -- Tajo Tecnologia Ltda, BR 7 - 2a06:e881:2502:: 33147 0.6% AS205908 -- PETERCXY-NETWORKS PeterCxy Networks, DE 8 - 2a0e:b107:2f0::/ 32620 0.6% AS205908 -- PETERCXY-NETWORKS PeterCxy Networks, DE 9 - 2a0e:b107:2f0::/ 31809 0.6% AS205908 -- PETERCXY-NETWORKS PeterCxy Networks, DE 10 - 2a00:9d20:5353:: 31400 0.6% AS60626 -- LEASEWEBCDN, NL 11 - 2a00:9d20:53::/4 31354 0.6% AS60626 -- LEASEWEBCDN, NL 12 - 2402:53c0:2000:: 31301 0.6% AS137144 -- PASSLIR-AS Passit Media And Communication Pvt. Ltd., IN 13 - 2404:5780:3::/48 27877 0.5% AS9558 -- PRIMECROWN-AS-IN PrimeCrown Technologies Private Limited, IN 14 - 2804:6e58:8800:: 27054 0.5% AS270590 -
[apops] BGP Update Report
BGP Update Report Interval: 08-Apr-21 -to- 22-Apr-21 (14 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASNUpds % Upds/PfxAS-Name 1 - AS18747 459348 5.3%1331.4 -- IFX18747, US 2 - AS33548 241452 2.8% 13414.0 -- UNWIRED-NOC, US 3 - AS12696 212277 2.5% 10613.9 -- AXA-TECH Paris, FR 4 - AS40065 194951 2.2% 368.5 -- CNSERVERS, US 5 - AS16509 138148 1.6% 42.5 -- AMAZON-02, US 6 - AS982976899 0.9% 45.1 -- BSNL-NIB National Internet Backbone, IN 7 - AS17885 67287 0.8% 529.8 -- JKTXLNET-AS-AP PT XL Axiata Tbk, ID 8 - AS13904 67264 0.8% 393.4 -- COSLINK, US 9 - AS40410 65067 0.8%1859.1 -- USFRCS-BGP, US 10 - AS55410 61383 0.7% 2.9 -- VIL-AS-AP Vodafone Idea Ltd, IN 11 - AS139330 55120 0.6%2296.7 -- SANRENDATALIMITED-AS-AP SANREN DATA LIMITED, HK 12 - AS58424 54984 0.6%1145.5 -- XINWEITELECOM-KH # 3BEo, Sangkat Beoun Prolit, Khan 7Makara, Phnom Penh., KH 13 - AS597253680 0.6% 24.2 -- DNIC-ASBLK-05800-06055, US 14 - AS47730 51159 0.6% 25579.5 -- JEANDELESTRE, FR 15 - AS47331 49935 0.6% 6.2 -- TTNET, TR 16 - AS36903 49250 0.6% 41.4 -- MT-MPLS, MA 17 - AS10620 48092 0.6% 14.4 -- Telmex Colombia S.A., CO 18 - AS25019 46735 0.5% 37.2 -- SAUDINETSTC-AS, SA 19 - AS614745315 0.5% 40.1 -- Telefonica del Peru S.A.A., PE 20 - AS815142587 0.5% 5.6 -- Uninet S.A. de C.V., MX TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASNUpds % Upds/PfxAS-Name 1 - AS47730 51159 0.6% 25579.5 -- JEANDELESTRE, FR 2 - AS33548 241452 2.8% 13414.0 -- UNWIRED-NOC, US 3 - AS12696 212277 2.5% 10613.9 -- AXA-TECH Paris, FR 4 - AS209348 37816 0.4%9454.0 -- NPISP, IQ 5 - AS262179 28029 0.3%9343.0 -- Telenetwork de El Salvador, SV 6 - AS59433 22633 0.3%7544.3 -- SRVLND-AS, RU 7 - AS1342739496 0.1%4748.0 -- DMBPL-AS-IN D M Broadband, IN 8 - AS454944739 0.1%4739.0 -- LAHAI-SG NREN ASN for Misc. Root Servers and Community, NP 9 - AS147103893 0.1%3893.0 -- ASN-CXA-OM-14710-CBS, US 10 - AS26405 39142 0.5%3261.8 -- HDCS, US 11 - AS266172 19294 0.2%2756.3 -- Provedor Inter.Net, BR 12 - AS829135639 0.4%2741.5 -- RSNET-AS RSNET, RU 13 - AS17794 36506 0.4%2607.6 -- HTCL-ORANGE-HK-AP Hutchison Telephone Company Limited, HK 14 - AS20101 30088 0.3%2507.3 -- MICHWAVE, US 15 - AS584212420 0.0%2420.0 -- PS-NZ-AS-AP Parliamentary Service, NZ 16 - AS18117 37645 0.4%2352.8 -- HARBOURMSP-AU-AP NTT Communications ICT Solutions, AU 17 - AS139330 55120 0.6%2296.7 -- SANRENDATALIMITED-AS-AP SANREN DATA LIMITED, HK 18 - AS1359502167 0.0%2167.0 -- ICTBINHDUONG-AS-VN Binh Duong E-Government Information Center, VN 19 - AS2091414279 0.1%2139.5 -- CMI-RUSSIA, RU 20 - AS2129072102 0.0%2102.0 -- SYSTEMGROUP, IR TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 64.192.1.0/24 42417 0.5% AS33548 -- UNWIRED-NOC, US 2 - 64.192.3.0/24 40424 0.5% AS33548 -- UNWIRED-NOC, US 3 - 64.192.0.0/24 40184 0.5% AS33548 -- UNWIRED-NOC, US 4 - 64.192.2.0/24 40181 0.5% AS33548 -- UNWIRED-NOC, US 5 - 64.192.4.0/24 39458 0.4% AS33548 -- UNWIRED-NOC, US 6 - 67.211.53.0/2439131 0.4% AS26405 -- HDCS, US 7 - 64.192.5.0/24 38764 0.4% AS33548 -- UNWIRED-NOC, US 8 - 85.208.229.0/24 37688 0.4% AS209348 -- NPISP, IQ 9 - 118.127.80.0/22 37623 0.4% AS18117 -- HARBOURMSP-AU-AP NTT Communications ICT Solutions, AU 10 - 216.238.254.0/23 36016 0.4% AS13904 -- COSLINK, US 11 - 95.173.129.0/24 35627 0.4% AS8291 -- RSNET-AS RSNET, RU 12 - 64.68.236.0/2229841 0.3% AS13904 -- COSLINK, US 13 - 168.243.93.0/24 28022 0.3% AS262179 -- Telenetwork de El Salvador, SV 14 - 45.148.160.0/24 25638 0.3% AS47730 -- JEANDELESTRE, FR 15 - 45.148.160.0/22 25521 0.3% AS47730 -- JEANDELESTRE, FR 16 - 199.169.205.0/24 25206 0.3% AS40410 -- USFRCS-BGP, US 17 - 62.76.72.0/24 22621 0.2% AS59433 -- SRVLND-AS, RU 18 - 199.169.238.0/24 19792 0.2% AS40410 -- USFRCS-BGP, US 19 - 199.169.239.0/24 19788 0.2% AS40410 -- USFRCS-BGP, US 20 - 99.194.200.0/22 17401 0.2% AS22561 -- CENTURYLINK-LEGACY-LIGHTCORE, US Details at http://bgpupdates.potaroo.net Copies of this report are mailed to: apops@apops.net ___ apops mailing list apops@apops.net https://mailman.apnic.net/mailman/listinf
[apops] Weekly Routing Table Report
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-st...@lists.apnic.net For historical data, please see http://thyme.rand.apnic.net. If you have any comments please contact Philip Smith . Routing Table Report 04:00 +10GMT Sat 24 Apr, 2021 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary BGP routing table entries examined: 857293 Prefixes after maximum aggregation (per Origin AS): 324456 Deaggregation factor: 2.64 Unique aggregates announced (without unneeded subnets): 406443 Total ASes present in the Internet Routing Table: 71149 Prefixes per ASN: 12.05 Origin-only ASes present in the Internet Routing Table: 61197 Origin ASes announcing only one prefix: 25304 Transit ASes present in the Internet Routing Table:9952 Transit-only ASes present in the Internet Routing Table:318 Average AS path length visible in the Internet Routing Table: 4.3 Max AS path length visible: 38 Max AS path prepend of ASN ( 37385) 33 Prefixes from unregistered ASNs in the Routing Table: 1013 Number of instances of unregistered ASNs: 1024 Number of 32-bit ASNs allocated by the RIRs: 35805 Number of 32-bit ASNs visible in the Routing Table: 29816 Prefixes from 32-bit ASNs in the Routing Table: 138622 Number of bogon 32-bit ASNs visible in the Routing Table:26 Special use prefixes present in the Routing Table:1 Prefixes being announced from unallocated address space:497 Number of addresses announced to Internet: 3031282560 Equivalent to 180 /8s, 173 /16s and 179 /24s Percentage of available address space announced: 81.9 Percentage of allocated address space announced: 81.9 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.5 Total number of prefixes smaller than registry allocations: 291090 APNIC Region Analysis Summary - Prefixes being announced by APNIC Region ASes: 226990 Total APNIC prefixes after maximum aggregation: 65614 APNIC Deaggregation factor:3.46 Prefixes being announced from the APNIC address blocks: 223063 Unique aggregates announced from the APNIC address blocks:89596 APNIC Region origin ASes present in the Internet Routing Table: 11532 APNIC Prefixes per ASN: 19.34 APNIC Region origin ASes announcing only one prefix: 3302 APNIC Region transit ASes present in the Internet Routing Table: 1622 Average APNIC Region AS path length visible:4.5 Max APNIC Region AS path length visible: 30 Number of APNIC region 32-bit ASNs visible in the Routing Table: 6680 Number of APNIC addresses announced to Internet: 771997952 Equivalent to 46 /8s, 3 /16s and 193 /24s APNIC AS Blocks4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 64297-64395, 131072-143673 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:246095 Total ARIN prefixes after maximum aggregation: 113015 ARIN Deaggregation factor: 2.18 Prefixes being announced from the ARIN address blocks: 246524 Unique aggregates announced from the ARIN address blocks:117903 ARIN Region origin ASes present in the Internet Routing Table:18782 ARIN Prefixes per ASN:13.13 ARIN Regio