IPv4 R&E Routing Table Report 17:00 GMT Fri 22 May, 2026 IPv4 BGP Table (R&E) as seen at GEANT. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/GEANT/ Analysis Summary ---------------- BGP routing table entries examined: 18572 Prefixes after maximum aggregation (per Origin AS): 10413 Deaggregation factor: 1.78 Unique aggregates announced (without unneeded subnets): 11477 Number of IPv4 prefixes with a valid ROA: 8420 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 10150 Total ASes present in the Internet Routing Table: 2635 Prefixes per ASN: 7.05 Origin-only ASes present in the Internet Routing Table: 2293 Origin ASes announcing only one prefix: 1007 Transit ASes present in the Internet Routing Table: 342 Transit-only ASes present in the Internet Routing Table: 49 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.9 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 2 Number of instances of unregistered ASNs: 2 Number of 32-bit ASNs allocated by the RIRs: 49865 Number of 32-bit ASNs visible in the Routing Table: 676 Prefixes from 32-bit ASNs in the Routing Table: 1889 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: 195374208 Equivalent to 11 /8s, 165 /16s and 44 /24s Percentage of available address space announced: 5.3 Percentage of allocated address space announced: 5.3 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: 2168 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4740 Total APNIC prefixes after maximum aggregation: 2312 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4740 Unique aggregates announced from the APNIC address blocks: 2549 APNIC Region origin ASes present in the Internet Routing Table: 583 APNIC Prefixes per ASN: 8.13 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 3.8 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 241 Number of APNIC addresses announced to Internet: 43468352 Equivalent to 2 /8s, 151 /16s and 70 /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: 8081 Total ARIN prefixes after maximum aggregation: 4810 ARIN Deaggregation factor: 1.68 Prefixes being announced from the ARIN address blocks: 8094 Unique aggregates announced from the ARIN address blocks: 5430 ARIN Region origin ASes present in the Internet Routing Table: 1254 ARIN Prefixes per ASN: 6.45 ARIN Region origin ASes announcing only one prefix: 432 ARIN Region transit ASes present in the Internet Routing Table: 147 Average ARIN Region AS path length visible: 4.2 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 214 Number of ARIN addresses announced to Internet: 89502208 Equivalent to 5 /8s, 85 /16s and 178 /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: 3378 Total RIPE prefixes after maximum aggregation: 2695 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3362 Unique aggregates announced from the RIPE address blocks: 2734 RIPE Region origin ASes present in the Internet Routing Table: 588 RIPE Prefixes per ASN: 5.72 RIPE Region origin ASes announcing only one prefix: 263 RIPE Region transit ASes present in the Internet Routing Table: 100 Average RIPE Region AS path length visible: 2.8 Max RIPE Region AS path length visible: 12 Number of RIPE region 32-bit ASNs visible in the Routing Table: 150 Number of RIPE addresses announced to Internet: 56207232 Equivalent to 3 /8s, 89 /16s and 167 /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: 1149 Total LACNIC prefixes after maximum aggregation: 398 LACNIC Deaggregation factor: 2.89 Prefixes being announced from the LACNIC address blocks: 1147 Unique aggregates announced from the LACNIC address blocks: 481 LACNIC Region origin ASes present in the Internet Routing Table: 120 LACNIC Prefixes per ASN: 9.56 LACNIC Region origin ASes announcing only one prefix: 47 LACNIC Region transit ASes present in the Internet Routing Table: 21 Average LACNIC Region AS path length visible: 4.2 Max LACNIC Region AS path length visible: 9 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 54 Number of LACNIC addresses announced to Internet: 3743168 Equivalent to 0 /8s, 57 /16s and 29 /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: 1222 Total AfriNIC prefixes after maximum aggregation: 196 AfriNIC Deaggregation factor: 6.23 Prefixes being announced from the AfriNIC address blocks: 1227 Unique aggregates announced from the AfriNIC address blocks: 281 AfriNIC Region origin ASes present in the Internet Routing Table: 39 AfriNIC Prefixes per ASN: 31.46 AfriNIC Region origin ASes announcing only one prefix: 17 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 4.5 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 17 Number of AfriNIC addresses announced to Internet: 2452736 Equivalent to 0 /8s, 37 /16s and 109 /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 Informa 7497 466 212 24 CSTNET-AS-AP Computer Network Information 1237 199 72 154 KREONET-AS-KR KISTI, KR 4538 190 4191 71 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 166 281 113 AARNET-AS-AP Australian Academic and Rese 55824 151 19 20 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 1659 60 954 34 ERX-TANET-ASN1 Taiwan Academic Network TA Complete listing at https://bgp.nsrc.org/REN/GEANT/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 376 196 146 150 RISQ-AS - Reseau dInformations Scientifiq 668 187 585 160 DNIC-AS-00668 - United States Department 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 81 115 455 35 NCREN - MCNC, US 21976 92 34 14 NJEDGE-NET - NJEDge.Net, Inc., US 270 84 247 34 AS270 - National Aeronautics and Space Ad 237 83 542 49 MERIT-AS-14 - Merit Network Inc., US Complete listing at https://bgp.nsrc.org/REN/GEANT/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 Deutschen 786 210 1684 192 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 1103 99 1503 84 SURFNET-NL SURFnet, The Netherlands, NL 8895 98 24 5 ISU Internet Services Unit ISU, SA 2614 87 26 67 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 64 630 59 FR-RENATER Reseau National de telecommuni Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 308 161 43 Rede Nacional de Ensino e Pesquisa, BR 11340 109 25 48 Red Universitaria Nacional, CL 3596 69 8 4 Universidad Autonoma Metropolitana, MX 271640 65 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 19611 53 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 51 84 38 Fundacao Carlos Chagas Filho de Amparo a 61468 51 3 20 CEDIA, EC 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 20191 26 16 1 Pontificia Universidad Catolica de Chile, Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 560 82 3 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 2561 68 4 34 EUN, EG 8094 46 48 21 PUKNET, ZA 37215 45 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 327700 13 16 1 MoRENet, MZ 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 37182 10 8 1 TERNET, TZ Complete listing at https://bgp.nsrc.org/REN/GEANT/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 Informa 36914 560 82 3 KENET-AS, KE 7497 466 212 24 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 1916 308 161 43 Rede Nacional de Ensino e Pesquisa, BR 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 786 210 1684 192 JANET Jisc Services Limited, GB 1237 199 72 154 KREONET-AS-KR KISTI, KR 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 150 RISQ-AS - Reseau dInformations Scientifiq Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 560 557 KENET-AS, KE 7497 466 442 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 1916 308 265 Rede Nacional de Ensino e Pesquisa, BR 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 4538 190 119 ERX-CERNET-BKB China Education and Research Net Complete listing at https://bgp.nsrc.org/REN/GEANT/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276 - University 401367 UNALLOCATED 216.186.25.0/24 10430 WA-K20 - Washington Sta Complete listing at https://bgp.nsrc.org/REN/GEANT/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP Adelaide Unive 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/GEANT/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 /13:18 /14:35 /15:114 /16:1946 /17:421 /18:461 /19:591 /20:817 /21:885 /22:1362 /23:1528 /24:10197 /25:59 /26:83 /27:43 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 536 560 KENET-AS, KE 8895 95 98 ISU Internet Services Unit ISU, SA 1916 88 308 Rede Nacional de Ensino e Pesquisa, BR 31638 48 48 ASN-LEPIDA, IT 37215 39 45 MAREN, MW 200521 34 58 SEAP-AGE, ES 46115 32 35 LUTHER - Luther College, US 25977 30 44 HCCS - HOUSTON COMMUNITY COLLEGE SYSTEM, US 27609 29 45 USC-UNIVERSITY-HOSPITAL - USC-University Hospital, US 40326 29 33 ECKERD-COLLEGE - Eckerd College, US Complete listing at https://bgp.nsrc.org/REN/GEANT/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:19 6:5 8:2 12:1 14:95 23:9 24:1 31:1 35:3 37:26 38:10 40:1 41:236 42:20 44:6 45:35 46:5 47:1 49:13 50:3 58:14 59:20 60:6 61:3 62:6 63:32 64:43 65:6 66:37 67:39 68:12 69:18 70:2 72:6 74:55 76:26 77:4 78:3 79:6 80:7 81:27 82:3 83:7 84:7 85:26 86:1 87:1 89:17 91:35 93:14 94:2 95:2 96:5 97:1 98:2 101:5 102:4 103:329 104:77 108:9 109:13 110:1 111:3 113:2 114:24 116:7 117:5 118:32 119:36 121:18 122:8 123:8 124:42 125:3 128:58 129:46 130:100 131:59 132:62 133:157 134:117 136:199 137:63 138:9 139:5 140:33 141:8 142:31 143:25 144:4 145:13 146:135 147:66 148:70 149:11 150:36 151:8 152:116 153:15 154:38 155:88 156:128 157:26 158:28 159:113 160:34 161:34 162:20 163:79 164:10 165:47 166:1 167:18 168:104 169:7 170:16 172:1 173:5 175:15 177:6 179:12 180:16 181:1 182:11 184:6 185:39 186:3 187:8 188:22 190:17 191:13 192:1455 193:305 194:116 195:97 196:149 197:348 198:458 199:279 200:311 201:5 202:610 203:429 204:386 205:123 206:198 207:215 208:35 209:89 210:232 211:15 212:135 213:4 214:8 216:92 217:22 218:21 219:7 220:16 222:4 223:6 End of report