This is an automated weekly mailing describing the state of the IPv4 Research & Education Routing Table received by NSRC's collector from RENU's network. Daily listings are sent to ren-bgp-stats-all@lists.nsrc.org. For historical data, please see https://bgp.nsrc.org. If you have any comments please contact Philip Smith . IPv4 R&E Routing Table Report 18:40 GMT Sat 17 Jan, 2026 IPv4 BGP Table (Global) as seen at RENU. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/RENU/ Analysis Summary ---------------- BGP routing table entries examined: 1052769 Prefixes after maximum aggregation (per Origin AS): 395627 Deaggregation factor: 2.66 Unique aggregates announced (without unneeded subnets): 505505 Number of IPv4 prefixes with a valid ROA: 625125 Number of IPv4 prefixes with an invalid ROA: 2888 Number of IPv4 prefixes with no ROA: 424756 Total ASes present in the Internet Routing Table: 77929 Prefixes per ASN: 13.51 Origin-only ASes present in the Internet Routing Table: 66824 Origin ASes announcing only one prefix: 26860 Transit ASes present in the Internet Routing Table: 11105 Transit-only ASes present in the Internet Routing Table: 578 Paths with bogon ASNs present in the IPv4 Routing Table: 173 Average AS path length visible in the Internet Routing Table: 5.0 Max AS path length visible: 215 Max AS path prepend of ASN (207138) 207 Prefixes from unregistered ASNs in the Routing Table: 1060 Number of instances of unregistered ASNs: 1123 Number of 32-bit ASNs allocated by the RIRs: 48411 Number of 32-bit ASNs visible in the Routing Table: 39741 Prefixes from 32-bit ASNs in the Routing Table: 227278 Number of bogon 32-bit ASNs visible in the Routing Table: 159 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 506 Number of addresses announced to Internet: 3103093760 Equivalent to 184 /8s, 245 /16s and 116 /24s Percentage of available address space announced: 83.8 Percentage of allocated address space announced: 83.8 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: 346483 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 286030 Total APNIC prefixes after maximum aggregation: 82090 APNIC Deaggregation factor: 3.48 Prefixes being announced from the APNIC address blocks: 272984 Unique aggregates announced from the APNIC address blocks: 106697 APNIC Region origin ASes present in the Internet Routing Table: 15068 APNIC Prefixes per ASN: 18.12 APNIC Region origin ASes announcing only one prefix: 4585 APNIC Region transit ASes present in the Internet Routing Table: 2007 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 34 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10610 Number of APNIC addresses announced to Internet: 753907200 Equivalent to 44 /8s, 239 /16s and 182 /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: 304141 Total ARIN prefixes after maximum aggregation: 134977 ARIN Deaggregation factor: 2.25 Prefixes being announced from the ARIN address blocks: 303972 Unique aggregates announced from the ARIN address blocks: 145380 ARIN Region origin ASes present in the Internet Routing Table: 19390 ARIN Prefixes per ASN: 15.68 ARIN Region origin ASes announcing only one prefix: 7069 ARIN Region transit ASes present in the Internet Routing Table: 1956 Average ARIN Region AS path length visible: 4.7 Max ARIN Region AS path length visible: 36 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5449 Number of ARIN addresses announced to Internet: 1341559296 Equivalent to 79 /8s, 246 /16s and 146 /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: 289011 Total RIPE prefixes after maximum aggregation: 140189 RIPE Deaggregation factor: 2.06 Prefixes being announced from the RIPE address blocks: 290339 Unique aggregates announced from the RIPE address blocks: 184544 RIPE Region origin ASes present in the Internet Routing Table: 29177 RIPE Prefixes per ASN: 9.95 RIPE Region origin ASes announcing only one prefix: 12079 RIPE Region transit ASes present in the Internet Routing Table: 4012 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 215 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12959 Number of RIPE addresses announced to Internet: 733264640 Equivalent to 43 /8s, 180 /16s and 187 /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: 133669 Total LACNIC prefixes after maximum aggregation: 30528 LACNIC Deaggregation factor: 4.38 Prefixes being announced from the LACNIC address blocks: 129264 Unique aggregates announced from the LACNIC address blocks: 49578 LACNIC Region origin ASes present in the Internet Routing Table: 11349 LACNIC Prefixes per ASN: 11.39 LACNIC Region origin ASes announcing only one prefix: 2424 LACNIC Region transit ASes present in the Internet Routing Table: 2561 Average LACNIC Region AS path length visible: 5.6 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9348 Number of LACNIC addresses announced to Internet: 170656256 Equivalent to 10 /8s, 44 /16s and 2 /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: 38858 Total AfriNIC prefixes after maximum aggregation: 7122 AfriNIC Deaggregation factor: 5.46 Prefixes being announced from the AfriNIC address blocks: 55704 Unique aggregates announced from the AfriNIC address blocks: 18882 AfriNIC Region origin ASes present in the Internet Routing Table: 2012 AfriNIC Prefixes per ASN: 27.69 AfriNIC Region origin ASes announcing only one prefix: 703 AfriNIC Region transit ASes present in the Internet Routing Table: 386 Average AfriNIC Region AS path length visible: 4.9 Max AfriNIC Region AS path length visible: 57 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1375 Number of AfriNIC addresses announced to Internet: 103411968 Equivalent to 6 /8s, 41 /16s and 241 /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 9808 13588 8947 105 CHINAMOBILE-CN China Mobile Communication 7545 6028 833 574 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4704 543 340 BBIL-AP BHARTI Airtel Ltd., IN 18403 4455 347 24 FPT-AS-AP FPT Telecom Company, VN 7552 4053 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3759 1044 65 TELKOMNET-AS-AP PT Telekomunikasi Indones 4538 3439 4193 76 ERX-CERNET-BKB China Education and Resear 56046 3417 831 184 CMNET-JIANGSU-AP China Mobile communicati 45899 3333 1868 98 VNPT-AS-VN VNPT Corp, VN 24560 2965 865 502 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14054 38739 5435 AMAZON-02, US 174 4949 8766 838 COGENT-174, US 22773 4656 3107 331 ASN-CXA-ALL-CCI-22773-RDC, US 11492 4635 308 1031 CABLEONE, US 7155 3868 287 89 VIASAT-SP-BACKBONE, US 6327 3697 1321 70 SHAW, CA 396982 3326 4868 497 GOOGLE-CLOUD-PLATFORM, US 749 3145 54729 2396 DNIC-AS-00749, US 16625 2949 1274 2170 AKAMAI-AS, US 36352 2701 222 889 AS-COLOCROSSING, US Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 12479 7241 1711 149 UNI2-AS, ES 39891 4969 306 72 ALJAWWALSTC-AS, SA 9009 3952 368 2245 M247, RO 20940 3945 3393 113 AKAMAI-ASN1, NL 12389 3170 2317 871 ROSTELECOM-AS PJSC Rostelecom. Technical 5384 2642 585 28 EMIRATES-INTERNET Emirates Internet, AE 212238 2570 183 1867 CDNEXT, GB 34984 2425 372 577 TELLCOM-AS, TR 8452 1718 1852 14 TE-AS TE-AS, EG 203020 1630 244 800 HOSTROYALE, IN Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 12726 3300 603 UNINET, MX 10620 3434 457 1108 Telmex Colombia S.A., CO 13999 2486 508 350 Mega Cable, S.A. de C.V., MX 11830 1991 369 65 Instituto Costarricense de Electricidad y 28573 1375 2430 272 Claro NXT Telecomunicacoes Ltda, BR 11664 1352 278 33 Techtel LMDS Comunicaciones Interactivas 3816 1339 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1255 371 22 Telefonica del Peru S.A.A., PE 22884 1057 67 358 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1014 2486 56 TIM SA, BR Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 24835 1982 638 33 RAYA-AS, EG 36992 1843 1534 340 ETISALAT-MISR, EG 20011 1327 205 344 NTT-DATA-Inc, ZA 24863 1281 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 36935 1146 524 47 Vodafone-, EG 37069 1101 1096 13 MOBINIL, EG 29571 1070 78 20 ORANGE-COTE-IVOIRE, CI 328608 576 53 167 Africa-on-Cloud-AS, ZA 36914 573 82 3 KENET-AS, KE Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14054 38739 5435 AMAZON-02, US 9808 13588 8947 105 CHINAMOBILE-CN China Mobile Communication 8151 12726 3300 603 UNINET, MX 12479 7241 1711 149 UNI2-AS, ES 7545 6028 833 574 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 306 72 ALJAWWALSTC-AS, SA 174 4949 8766 838 COGENT-174, US 9498 4704 543 340 BBIL-AP BHARTI Airtel Ltd., IN 22773 4656 3107 331 ASN-CXA-ALL-CCI-22773-RDC, US 11492 4635 308 1031 CABLEONE, US Complete listing at https://bgp.nsrc.org/REN/RENU/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 13588 13483 CHINAMOBILE-CN China Mobile Communications Grou 8151 12726 12123 UNINET, MX 12479 7241 7092 UNI2-AS, ES 7545 6028 5454 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 4897 ALJAWWALSTC-AS, SA 18403 4455 4431 FPT-AS-AP FPT Telecom Company, VN 9498 4704 4364 BBIL-AP BHARTI Airtel Ltd., IN 22773 4656 4325 ASN-CXA-ALL-CCI-22773-RDC, US 174 4949 4111 COGENT-174, US 7552 4053 4024 VIETEL-AS-AP Viettel Group, VN Complete listing at https://bgp.nsrc.org/REN/RENU/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887, US 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3, US 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE, US 395195 UNALLOCATED 8.38.115.0/24 3356 LEVEL3, US 1782 UNALLOCATED 8.42.19.0/24 3356 LEVEL3, US 13342 UNALLOCATED 12.17.5.0/24 174 COGENT-174, US 26345 UNALLOCATED 12.21.93.0/24 40264 TWC-40264-WI-MN-UPPERMI 396831 UNALLOCATED 12.23.198.0/24 7018 ATT-INTERNET4, US 395476 UNALLOCATED 12.36.194.0/24 7018 ATT-INTERNET4, US 395476 UNALLOCATED 12.36.195.0/24 3356 LEVEL3, US Complete listing at https://bgp.nsrc.org/REN/RENU/data-badAS Prefixes from the Special Purpose Address Registry (Global) ----------------------------------------------------------- Prefix Origin AS Description 192.88.99.0/24 6939 HURRICANE, US Complete listing at https://bgp.nsrc.org/REN/RENU/data-spar Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 23.137.48.0/24 Origin: 16904 ARVIG-16904, US 23.137.48.0/24 Transit: 174 COGENT-174, US 23.137.200.0/24 Origin: 16276 OVH, FR 23.137.200.0/24 Transit: 37100 SEACOM-AS, MU 23.140.216.0/24 Origin: 27176 DATAWAGON, US 23.140.216.0/24 Transit: 20278 NEXEON, US 23.141.0.0/24 Origin: 395350 RESERVED, ZZ 23.141.0.0/24 Transit: 11426 TWC-11426-CAROLINAS, US 23.142.24.0/24 Origin: 62164 HEYMMAN-2, CA 23.142.24.0/24 Transit: 64236 UNREAL-SERVERS, US Complete listing at https://bgp.nsrc.org/REN/RENU/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 /8:16 /9:14 /10:40 /11:93 /12:303 /13:582 /14:1207 /15:2107 /16:13756 /17:8290 /18:13770 /19:25285 /20:46613 /21:53647 /22:115478 /23:111270 /24:660298 /25:0 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 8151 6877 12726 UNINET, MX 12479 6172 7241 UNI2-AS, ES 39891 3655 4969 ALJAWWALSTC-AS, SA 11492 3497 4635 CABLEONE, US 6327 3479 3697 SHAW, CA 22773 3050 4656 ASN-CXA-ALL-CCI-22773-RDC, US 7155 2827 3868 VIASAT-SP-BACKBONE, US 16509 2494 14054 AMAZON-02, US 30036 2318 2660 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2214 3434 Telmex Colombia S.A., CO Complete listing at https://bgp.nsrc.org/REN/RENU/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2527 2:1651 3:978 4:9 5:5371 6:185 7:6 8:1504 9:14 11:172 12:1226 13:626 14:2650 15:414 16:179 17:393 18:920 20:616 21:4 22:188 23:8220 24:2774 25:2 27:2880 29:19 31:3533 32:39 34:88 35:294 36:4659 37:4606 38:11098 39:1254 40:443 41:4701 42:1992 43:2964 44:417 45:20452 46:5045 47:330 49:2183 50:2071 51:600 52:1255 54:236 55:1083 56:11 57:297 58:2371 59:1504 60:1178 61:3359 62:3148 63:1779 64:6239 65:2156 66:6114 67:3312 68:1522 69:4348 70:1035 71:464 72:3183 74:2996 75:1533 76:613 77:2887 78:1926 79:1816 80:2314 81:2127 82:4072 83:1534 84:2059 85:3687 86:1194 87:2370 88:1366 89:4667 90:828 91:8512 92:2935 93:3026 94:4406 95:4551 96:1498 97:318 98:957 99:785 100:69 101:1581 102:4777 103:32919 104:5441 105:1135 106:918 107:2825 108:1237 109:4263 110:2307 111:4119 112:3087 113:2003 114:2175 115:2395 116:2272 117:3318 118:3013 119:2167 120:2624 121:1571 122:2992 123:2582 124:1768 125:3002 126:125 128:1624 129:961 130:1581 131:2371 132:772 133:461 134:1644 135:581 136:1638 137:1243 138:3147 139:1602 140:1693 141:1577 142:2472 143:2154 144:1558 145:637 146:2167 147:2282 148:2833 149:2995 150:1334 151:2627 152:2276 153:914 154:9870 155:2289 156:4364 157:2162 158:1500 159:2740 160:3775 161:2030 162:4026 163:2330 164:1989 165:2662 166:1309 167:2175 168:4053 169:852 170:5616 171:1119 172:4570 173:3468 174:895 175:1373 176:3885 177:5269 178:4377 179:2459 180:3045 181:4590 182:3914 183:2753 184:2086 185:21965 186:6070 187:5022 188:4647 189:4668 190:9975 191:1639 192:11482 193:9547 194:7988 195:5861 196:3597 197:3976 198:6133 199:6133 200:8468 201:6541 202:11025 203:10827 204:4697 205:3703 206:4420 207:3831 208:4421 209:5479 210:4995 211:2788 212:5008 213:4113 214:1063 215:54 216:7236 217:3630 218:1683 219:530 220:2198 221:1314 222:1003 223:3326 End of report