IPv4 R&E Routing Table Report 17:05 GMT Tue 26 May, 2026 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: 13455 Prefixes after maximum aggregation (per Origin AS): 8270 Deaggregation factor: 1.63 Unique aggregates announced (without unneeded subnets): 9229 Number of IPv4 prefixes with a valid ROA: 5997 Number of IPv4 prefixes with an invalid ROA: 1 Number of IPv4 prefixes with no ROA: 7457 Total ASes present in the Internet Routing Table: 2089 Prefixes per ASN: 6.44 Origin-only ASes present in the Internet Routing Table: 1805 Origin ASes announcing only one prefix: 844 Transit ASes present in the Internet Routing Table: 284 Transit-only ASes present in the Internet Routing Table: 46 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: 14 Max AS path prepend of ASN ( 30116) 10 Prefixes from unregistered ASNs in the Routing Table: 1 Number of instances of unregistered ASNs: 1 Number of 32-bit ASNs allocated by the RIRs: 49887 Number of 32-bit ASNs visible in the Routing Table: 520 Prefixes from 32-bit ASNs in the Routing Table: 1345 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: 165004448 Equivalent to 9 /8s, 213 /16s and 196 /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: 1314 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3303 Total APNIC prefixes after maximum aggregation: 1686 APNIC Deaggregation factor: 1.96 Prefixes being announced from the APNIC address blocks: 3304 Unique aggregates announced from the APNIC address blocks: 1790 APNIC Region origin ASes present in the Internet Routing Table: 434 APNIC Prefixes per ASN: 7.61 APNIC Region origin ASes announcing only one prefix: 204 APNIC Region transit ASes present in the Internet Routing Table: 40 Average APNIC Region AS path length visible: 4.3 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 190 Number of APNIC addresses announced to Internet: 40940352 Equivalent to 2 /8s, 112 /16s and 179 /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: 6129 Total ARIN prefixes after maximum aggregation: 3624 ARIN Deaggregation factor: 1.69 Prefixes being announced from the ARIN address blocks: 6144 Unique aggregates announced from the ARIN address blocks: 4144 ARIN Region origin ASes present in the Internet Routing Table: 969 ARIN Prefixes per ASN: 6.34 ARIN Region origin ASes announcing only one prefix: 348 ARIN Region transit ASes present in the Internet Routing Table: 121 Average ARIN Region AS path length visible: 5.1 Max ARIN Region AS path length visible: 14 Number of ARIN region 32-bit ASNs visible in the Routing Table: 158 Number of ARIN addresses announced to Internet: 67031936 Equivalent to 3 /8s, 254 /16s and 211 /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, 393216-404380 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: 3152 Total RIPE prefixes after maximum aggregation: 2586 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 3135 Unique aggregates announced from the RIPE address blocks: 2663 RIPE Region origin ASes present in the Internet Routing Table: 566 RIPE Prefixes per ASN: 5.54 RIPE Region origin ASes announcing only one prefix: 254 RIPE Region transit ASes present in the Internet Routing Table: 93 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: 143 Number of RIPE addresses announced to Internet: 55637120 Equivalent to 3 /8s, 80 /16s and 244 /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: 526 Total LACNIC prefixes after maximum aggregation: 288 LACNIC Deaggregation factor: 1.83 Prefixes being announced from the LACNIC address blocks: 522 Unique aggregates announced from the LACNIC address blocks: 484 LACNIC Region origin ASes present in the Internet Routing Table: 41 LACNIC Prefixes per ASN: 12.73 LACNIC Region origin ASes announcing only one prefix: 20 LACNIC Region transit ASes present in the Internet Routing Table: 14 Average LACNIC Region AS path length visible: 4.3 Max LACNIC Region AS path length visible: 9 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 13 Number of LACNIC addresses announced to Internet: 757856 Equivalent to 0 /8s, 11 /16s and 144 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-275868 + 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: 344 Total AfriNIC prefixes after maximum aggregation: 85 AfriNIC Deaggregation factor: 4.05 Prefixes being announced from the AfriNIC address blocks: 348 Unique aggregates announced from the AfriNIC address blocks: 146 AfriNIC Region origin ASes present in the Internet Routing Table: 32 AfriNIC Prefixes per ASN: 10.88 AfriNIC Region origin ASes announcing only one prefix: 18 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 5.0 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 16 Number of AfriNIC addresses announced to Internet: 634880 Equivalent to 0 /8s, 9 /16s and 176 /24s AfriNIC AS Blocks 36864-37887, 327680-330751 & 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 612 2153 465 SINET-AS - Research Organization of Infor 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 58647 182 18 2 KAGAWAU-AS - Kagawa University, JP 4538 179 4190 71 ERX-CERNET-BKB - China Education and Rese 7575 166 281 113 AARNET-AS-AP - Australian Academic and Re 55824 151 19 20 NKN-CORE-NW - NKN Core Network, IN 6262 63 134 56 CSIRO - Commonwealth Scientific and Indus 1659 57 938 33 ERX-TANET-ASN1 - Taiwan Academic Network 38280 50 3 2 MONASHUNI-MY-AS-AP - Monash University Su 132524 42 8 9 TIFR-AS - Tata Institute of Fundamental R 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 197 16 1 UPRENET - University of Puerto Rico, PR 376 193 146 147 RISQ-AS - Reseau d'Informations Scientifi 2920 173 34 7 LACOE - Los Angeles County Office of Educ 2152 145 491 95 CENIC-2152 - CENIC, US 18558 140 18 4 NETBLK-RCOEK - Riverside County Office of 21976 92 34 14 NJEDGE-NET - NJEDge.Net, Inc., US 1736 79 16 1 MU-AS - Marquette University, US 22742 70 37 32 CT-EDU-NET - Connecticut Education Networ 81 69 241 26 NCREN - MCNC, US 271 68 26 53 BCNET-AS - BCNET, CA 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 680 291 1883 253 DFN - Verein zur Foerderung eines Deutsch 786 210 1684 192 JANET - Jisc Services Limited, GB 559 115 533 105 Switch - SWITCH, CH 1103 99 1503 84 SURFNET-NL - SURF B.V., NL 2614 87 26 67 RoEduNet - Agentia de Administrare a Rete 137 82 677 77 ASGARR - Consortium GARR, IT 1930 78 88 73 RCCN - Fundacao para a Ciencia e a Tecnol 2200 64 630 59 FR-RENATER - Renater, FR 200521 58 4 24 SEAP-AGE - Ministerio de Transformacion D 1653 52 150 49 SUNET - Vetenskapsradet / SUNET, EU 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 264 52 134 AS1916 - Rede Nacional de Ensino e Pesqui 11340 110 25 49 AS11340 - Red Universitaria Nacional, CL 61468 43 3 22 AS61468 - CEDIA, EC 20191 25 2 22 AS20191 - Pontificia Universidad Catolica 28027 12 1 7 AS28027 - Escuela Superior Politecnica de 278 11 32 3 AS278 - Universidad Nacional Autonoma de 52888 6 1 4 AS52888 - UNIVERSIDADE FEDERAL DE SAO CAR 262441 4 4 3 AS262441 - Fund. Vale do Taquari de Educ. 3596 3 0 3 AS3596 - Universidad Autonoma Metropolita 27676 3 0 3 AS27676 - ALMA - Atacama Large Millimeter 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 130 82 3 Kenya Education Network - Kenya Education 2561 68 4 34 Egyptian Universities Network (EUN) - Egy 37215 45 8 1 Malawi Research and Education Network - M 6879 24 2 9 ENSTINET - ENSTINET, EG 327700 13 16 1 Mozambique Research & Education Network - 30983 12 4 2 CNRST (Centre National pour la Recherche 37182 10 8 1 Tanzania Education And Research Network - 37654 9 1 5 Rwanda Ministry of Education - Rwanda Min 327798 4 0 3 BURUNDI EDUCATION AND RESEARCH NETWORK - 37661 3 6 3 Nigerian Research and Education Network L 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 612 2153 465 SINET-AS - Research Organization of Infor 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 680 291 1883 253 DFN - Verein zur Foerderung eines Deutsch 1916 264 52 134 AS1916 - Rede Nacional de Ensino e Pesqui 786 210 1684 192 JANET - Jisc Services Limited, GB 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 193 146 147 RISQ-AS - Reseau d'Informations Scientifi 58647 182 18 2 KAGAWAU-AS - Kagawa University, JP 4538 179 4190 71 ERX-CERNET-BKB - China Education and Rese 2920 173 34 7 LACOE - Los Angeles County Office of Educ Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 7497 465 441 CSTNET-AS-AP - Computer Network Information Cen 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 182 180 KAGAWAU-AS - Kagawa University, JP 2920 173 166 LACOE - Los Angeles County Office of Education, 18558 140 136 NETBLK-RCOEK - Riverside County Office of Educa 55824 151 131 NKN-CORE-NW - NKN Core Network, IN 1916 264 130 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 36914 130 127 Kenya Education Network - Kenya Education Netwo 4538 179 108 ERX-CERNET-BKB - China Education and Research N 21976 92 78 NJEDGE-NET - NJEDge.Net, Inc., 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 401367 UNALLOCATED 216.186.25.0/24 10430 WA-K20 - Washington Sta 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 Nigerian Research and Education Network 164.160.192.0/21 Transit: 37288 West and Central African Research Networ 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP - Adelaide Uni 203.9.156.0/24 Transit: 7575 AARNET-AS-AP - Australian Academic and R 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 /12:10 /13:16 /14:30 /15:100 /16:1600 /17:298 /18:310 /19:417 /20:583 /21:645 /22:1029 /23:1150 /24:7090 /25:55 /26:80 /27:40 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 115 130 Kenya Education Network - Kenya Education Network, KE 1916 88 264 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 31638 48 48 ASN-LEPIDA - Lepida S.c.p.A., IT 37215 39 45 Malawi Research and Education Network - MAREN - Malawi Research and Education Network - MAREN, MW 200521 34 58 SEAP-AGE - Ministerio de Transformacion Digital y de la Funcion Publica, ES 27609 29 45 USC-UNIVERSITY-HOSPITAL - USC-University Hospital, US 36794 24 26 META SOLUTIONS PIKETON - META Solutions, US 61468 23 43 AS61468 - CEDIA, EC 22742 20 70 CT-EDU-NET - Connecticut Education Network, US 47623 18 22 IIAP-ASNET-AS - Institute for Informatics and Automation Problems of National Academy of Sciences of the Republic of Armenia, AM Complete listing at https://bgp.nsrc.org/REN/ASREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1 5:19 6:5 8:2 12:1 14:95 23:5 24:1 31:1 35:1 37:26 38:4 40:1 41:110 42:17 44:6 45:21 46:4 47:1 49:13 50:1 58:12 59:17 60:6 61:3 62:5 63:32 64:18 65:3 66:28 67:4 68:9 69:13 70:2 72:5 74:18 76:19 77:4 78:3 79:6 80:5 81:26 82:3 83:7 84:6 85:26 86:1 87:1 89:17 91:31 93:14 94:2 95:1 96:5 98:2 101:4 102:4 103:250 104:71 108:7 109:3 111:3 114:1 116:7 118:32 119:35 121:17 122:8 123:8 124:42 128:52 129:37 130:100 131:44 132:51 133:157 134:84 136:190 137:53 138:9 139:4 140:30 141:6 142:29 143:14 144:4 145:13 146:121 147:16 148:9 149:11 150:9 151:6 152:60 153:8 154:13 155:24 156:123 157:7 158:27 159:111 160:33 161:12 162:18 163:78 164:10 165:5 167:12 168:37 169:6 170:10 172:1 173:5 177:1 179:3 180:15 182:1 184:6 185:34 187:8 188:22 190:14 191:1 192:1195 193:288 194:93 195:87 196:12 197:60 198:355 199:214 200:184 201:4 202:346 203:183 204:329 205:93 206:172 207:199 208:21 209:71 210:109 211:1 212:42 213:4 214:1 216:53 217:22 219:6 220:3 222:2 223:6 End of report