IPv4 R&E Routing Table Report 17:05 GMT Fri 18 Apr, 2025 IPv4 BGP Table (R&E) as seen at ASREN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/ASREN/ Analysis Summary ---------------- BGP routing table entries examined: 13842 Prefixes after maximum aggregation (per Origin AS): 8273 Deaggregation factor: 1.67 Unique aggregates announced (without unneeded subnets): 9109 Number of IPv4 prefixes with a valid ROA: 5835 Number of IPv4 prefixes with an invalid ROA: 1 Number of IPv4 prefixes with no ROA: 8006 Total ASes present in the Internet Routing Table: 2115 Prefixes per ASN: 6.54 Origin-only ASes present in the Internet Routing Table: 1838 Origin ASes announcing only one prefix: 858 Transit ASes present in the Internet Routing Table: 277 Transit-only ASes present in the Internet Routing Table: 42 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 20 Max AS path prepend of ASN (327947) 11 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 46240 Number of 32-bit ASNs visible in the Routing Table: 521 Prefixes from 32-bit ASNs in the Routing Table: 1312 Number of bogon 32-bit ASNs visible in the Routing Table: 0 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 2 Number of addresses announced to Internet: 166768288 Equivalent to 9 /8s, 240 /16s and 174 /24s Percentage of available address space announced: 4.5 Percentage of allocated address space announced: 4.5 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.6 Total number of prefixes smaller than registry allocations: 1637 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3418 Total APNIC prefixes after maximum aggregation: 1710 APNIC Deaggregation factor: 2.00 Prefixes being announced from the APNIC address blocks: 3418 Unique aggregates announced from the APNIC address blocks: 1861 APNIC Region origin ASes present in the Internet Routing Table: 451 APNIC Prefixes per ASN: 7.58 APNIC Region origin ASes announcing only one prefix: 210 APNIC Region transit ASes present in the Internet Routing Table: 41 Average APNIC Region AS path length visible: 4.1 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 201 Number of APNIC addresses announced to Internet: 37346880 Equivalent to 2 /8s, 57 /16s and 222 /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, 131072-155961 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: 5925 Total ARIN prefixes after maximum aggregation: 3529 ARIN Deaggregation factor: 1.68 Prefixes being announced from the ARIN address blocks: 5974 Unique aggregates announced from the ARIN address blocks: 3956 ARIN Region origin ASes present in the Internet Routing Table: 952 ARIN Prefixes per ASN: 6.28 ARIN Region origin ASes announcing only one prefix: 351 ARIN Region transit ASes present in the Internet Routing Table: 116 Average ARIN Region AS path length visible: 5.0 Max ARIN Region AS path length visible: 10 Number of ARIN region 32-bit ASNs visible in the Routing Table: 146 Number of ARIN addresses announced to Internet: 70062624 Equivalent to 4 /8s, 45 /16s and 18 /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, 393216-402332 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, 45/8, 47/8, 48/8, 50/8, 52/8, 54/8, 55/8, 56/8, 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: 3086 Total RIPE prefixes after maximum aggregation: 2567 RIPE Deaggregation factor: 1.20 Prefixes being announced from the RIPE address blocks: 3073 Unique aggregates announced from the RIPE address blocks: 2587 RIPE Region origin ASes present in the Internet Routing Table: 562 RIPE Prefixes per ASN: 5.47 RIPE Region origin ASes announcing only one prefix: 249 RIPE Region transit ASes present in the Internet Routing Table: 89 Average RIPE Region AS path length visible: 3.8 Max RIPE Region AS path length visible: 12 Number of RIPE region 32-bit ASNs visible in the Routing Table: 131 Number of RIPE addresses announced to Internet: 56358272 Equivalent to 3 /8s, 91 /16s and 245 /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 196608-216475 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 53/8, 57/8, 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: 734 Total LACNIC prefixes after maximum aggregation: 407 LACNIC Deaggregation factor: 1.80 Prefixes being announced from the LACNIC address blocks: 730 Unique aggregates announced from the LACNIC address blocks: 622 LACNIC Region origin ASes present in the Internet Routing Table: 76 LACNIC Prefixes per ASN: 9.61 LACNIC Region origin ASes announcing only one prefix: 31 LACNIC Region transit ASes present in the Internet Routing Table: 15 Average LACNIC Region AS path length visible: 4.7 Max LACNIC Region AS path length visible: 10 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 27 Number of LACNIC addresses announced to Internet: 2327488 Equivalent to 0 /8s, 35 /16s and 131 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-274844 + 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: 646 Total AfriNIC prefixes after maximum aggregation: 55 AfriNIC Deaggregation factor: 11.75 Prefixes being announced from the AfriNIC address blocks: 645 Unique aggregates announced from the AfriNIC address blocks: 81 AfriNIC Region origin ASes present in the Internet Routing Table: 30 AfriNIC Prefixes per ASN: 21.50 AfriNIC Region origin ASes announcing only one prefix: 17 AfriNIC Region transit ASes present in the Internet Routing Table: 8 Average AfriNIC Region AS path length visible: 5.4 Max AfriNIC Region AS path length visible: 20 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 16 Number of AfriNIC addresses announced to Internet: 670720 Equivalent to 0 /8s, 10 /16s and 60 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 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 2907 634 2170 464 SINET-AS Research Organization of Informa 7497 453 180 24 CSTNET-AS-AP Computer Network Information 4538 191 4192 71 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 282 117 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 2697 58 4 34 ERX-ERNET-AS Education and Research Netwo 38280 50 3 2 MONASHUNI-MY-AS-AP Monash University Sunw 45773 48 3 5 HECPERN-AS-PK PERN AS Content Servie Prov 132524 42 9 10 TIFR-AS Tata Institute of Fundamental Res Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 5786 198 16 1 UPRENET, PR 376 195 162 145 RISQ-AS, CA 2920 169 34 7 LACOE, US 2152 147 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 23024 99 7 17 OCDE, US 81 96 360 23 NCREN, US 21976 88 34 14 NJEDGE-NET, US 237 84 541 50 MERIT-AS-14, US 22742 67 37 32 CT-EDU-NET, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 786 197 1750 189 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 89 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 63 614 58 FR-RENATER Reseau National de telecommuni 1653 50 150 48 SUNET SUNET Swedish University Network, E Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 251 59 127 Rede Nacional de Ensino e Pesquisa, BR 11340 110 25 52 Red Universitaria Nacional, CL 271640 66 4 29 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 46 99 35 Fundacao Carlos Chagas Filho de Amparo a 1251 36 31 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 20191 28 16 1 Pontificia Universidad Catolica de Chile, 21612 15 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 278 12 9 10 Universidad Nacional Autonoma de Mexico, 28571 12 37 12 UNIVERSIDADE DE SAO PAULO, BR 61468 10 1 9 CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 513 82 3 KENET-AS, KE 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 37661 9 6 3 NRaE1-AS, NG 327798 4 0 3 BERNET, BI 327947 4 1 4 KNUST-, GH 37532 2 20 2 ZAMREN, ZM Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 634 2170 464 SINET-AS Research Organization of Informa 36914 513 82 3 KENET-AS, KE 7497 453 180 24 CSTNET-AS-AP Computer Network Information 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 1916 251 59 127 Rede Nacional de Ensino e Pesquisa, BR 5786 198 16 1 UPRENET, PR 786 197 1750 189 JANET Jisc Services Limited, GB 376 195 162 145 RISQ-AS, CA 4538 191 4192 71 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 513 510 KENET-AS, KE 7497 453 429 CSTNET-AS-AP Computer Network Information Cente 5786 198 197 UPRENET, PR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 169 162 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 146 126 NKN-CORE-NW NKN Core Network, IN 1916 251 124 Rede Nacional de Ensino e Pesquisa, BR 4538 191 120 ERX-CERNET-BKB China Education and Research Net 23024 99 82 OCDE, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 36288 UNALLOCATED 64.79.154.0/24 293 ESNET, US 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/ASREN/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 /8:0 /9:1 /10:1 /11:0 /12:9 /13:17 /14:33 /15:100 /16:1649 /17:311 /18:326 /19:467 /20:578 /21:614 /22:1026 /23:1130 /24:7428 /25:49 /26:72 /27:31 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 490 513 KENET-AS, KE 1916 75 251 Rede Nacional de Ensino e Pesquisa, BR 23024 38 99 OCDE, US 32440 31 53 LONI, US 37215 28 34 MAREN, MW 25977 27 30 HCCS, US 26898 24 64 RESERVED, ZZ 36794 24 26 META SOLUTIONS PIKETON, US 60187 23 48 LGFL-AS, GB 31638 21 21 ASN-LEPIDA, IT Complete listing at https://bgp.nsrc.org/REN/ASREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1 5:16 8:2 12:1 14:93 23:5 24:2 31:1 35:3 37:9 38:4 40:1 41:197 42:13 44:3 45:23 46:4 47:1 49:8 50:2 58:16 59:17 60:6 61:2 62:5 63:3 64:31 66:16 67:31 68:3 69:10 70:2 72:7 74:18 76:32 77:6 78:3 79:9 80:8 81:24 82:3 83:7 84:6 85:31 87:1 89:10 91:33 93:14 94:2 95:1 96:5 98:2 101:2 102:3 103:294 104:76 108:4 109:1 111:17 114:3 116:6 117:1 118:33 119:30 121:28 122:8 123:8 124:42 128:46 129:35 130:84 131:50 132:56 133:157 134:19 136:197 137:46 138:10 139:10 140:27 141:4 142:25 143:14 144:23 145:2 146:122 147:15 148:8 149:11 150:38 151:5 152:109 153:14 154:20 155:30 156:128 157:13 158:27 159:116 160:34 161:13 162:18 163:60 164:13 165:3 167:10 168:35 169:6 170:13 172:2 173:5 177:1 179:9 180:16 182:1 184:6 185:30 186:2 187:8 188:12 190:1 191:2 192:1160 193:251 194:84 195:59 196:10 197:324 198:342 199:202 200:247 201:2 202:365 203:185 204:313 205:103 206:160 207:196 208:49 209:83 210:107 211:2 212:19 213:4 216:52 217:21 219:6 220:4 222:3 223:5 End of report