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 10 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: 1053941 Prefixes after maximum aggregation (per Origin AS): 395966 Deaggregation factor: 2.66 Unique aggregates announced (without unneeded subnets): 505792 Number of IPv4 prefixes with a valid ROA: 626097 Number of IPv4 prefixes with an invalid ROA: 2955 Number of IPv4 prefixes with no ROA: 424889 Total ASes present in the Internet Routing Table: 77914 Prefixes per ASN: 13.53 Origin-only ASes present in the Internet Routing Table: 66788 Origin ASes announcing only one prefix: 26821 Transit ASes present in the Internet Routing Table: 11126 Transit-only ASes present in the Internet Routing Table: 569 Paths with bogon ASNs present in the IPv4 Routing Table: 176 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: 1106 Number of instances of unregistered ASNs: 1168 Number of 32-bit ASNs allocated by the RIRs: 48334 Number of 32-bit ASNs visible in the Routing Table: 39709 Prefixes from 32-bit ASNs in the Routing Table: 227287 Number of bogon 32-bit ASNs visible in the Routing Table: 157 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 579 Number of addresses announced to Internet: 3107968000 Equivalent to 185 /8s, 63 /16s and 212 /24s Percentage of available address space announced: 83.9 Percentage of allocated address space announced: 83.9 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: 346738 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 286022 Total APNIC prefixes after maximum aggregation: 81925 APNIC Deaggregation factor: 3.49 Prefixes being announced from the APNIC address blocks: 272568 Unique aggregates announced from the APNIC address blocks: 106736 APNIC Region origin ASes present in the Internet Routing Table: 15048 APNIC Prefixes per ASN: 18.11 APNIC Region origin ASes announcing only one prefix: 4559 APNIC Region transit ASes present in the Internet Routing Table: 2018 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: 10590 Number of APNIC addresses announced to Internet: 755907840 Equivalent to 45 /8s, 14 /16s and 61 /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: 304799 Total ARIN prefixes after maximum aggregation: 135245 ARIN Deaggregation factor: 2.25 Prefixes being announced from the ARIN address blocks: 305103 Unique aggregates announced from the ARIN address blocks: 145633 ARIN Region origin ASes present in the Internet Routing Table: 19391 ARIN Prefixes per ASN: 15.73 ARIN Region origin ASes announcing only one prefix: 7072 ARIN Region transit ASes present in the Internet Routing Table: 1951 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: 1343724288 Equivalent to 80 /8s, 23 /16s and 155 /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: 289628 Total RIPE prefixes after maximum aggregation: 140281 RIPE Deaggregation factor: 2.06 Prefixes being announced from the RIPE address blocks: 290461 Unique aggregates announced from the RIPE address blocks: 184214 RIPE Region origin ASes present in the Internet Routing Table: 29186 RIPE Prefixes per ASN: 9.95 RIPE Region origin ASes announcing only one prefix: 12061 RIPE Region transit ASes present in the Internet Routing Table: 4002 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: 12952 Number of RIPE addresses announced to Internet: 733937664 Equivalent to 43 /8s, 191 /16s and 0 /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: 133496 Total LACNIC prefixes after maximum aggregation: 30636 LACNIC Deaggregation factor: 4.36 Prefixes being announced from the LACNIC address blocks: 129048 Unique aggregates announced from the LACNIC address blocks: 49647 LACNIC Region origin ASes present in the Internet Routing Table: 11341 LACNIC Prefixes per ASN: 11.38 LACNIC Region origin ASes announcing only one prefix: 2426 LACNIC Region transit ASes present in the Internet Routing Table: 2584 Average LACNIC Region AS path length visible: 5.7 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9340 Number of LACNIC addresses announced to Internet: 170633984 Equivalent to 10 /8s, 43 /16s and 171 /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: 38890 Total AfriNIC prefixes after maximum aggregation: 7135 AfriNIC Deaggregation factor: 5.45 Prefixes being announced from the AfriNIC address blocks: 56182 Unique aggregates announced from the AfriNIC address blocks: 19068 AfriNIC Region origin ASes present in the Internet Routing Table: 2014 AfriNIC Prefixes per ASN: 27.90 AfriNIC Region origin ASes announcing only one prefix: 703 AfriNIC Region transit ASes present in the Internet Routing Table: 390 Average AfriNIC Region AS path length visible: 4.9 Max AfriNIC Region AS path length visible: 42 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1378 Number of AfriNIC addresses announced to Internet: 103419136 Equivalent to 6 /8s, 42 /16s and 13 /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 13487 8944 101 CHINAMOBILE-CN China Mobile Communication 7545 6029 833 575 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4690 543 339 BBIL-AP BHARTI Airtel Ltd., IN 18403 4312 347 24 FPT-AS-AP FPT Telecom Company, VN 7552 4059 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3759 1044 65 TELKOMNET-AS-AP PT Telekomunikasi Indones 4538 3442 4193 76 ERX-CERNET-BKB China Education and Resear 56046 3408 831 184 CMNET-JIANGSU-AP China Mobile communicati 45899 3334 1868 98 VNPT-AS-VN VNPT Corp, VN 17561 3165 199 621 LCS-AS-AP LARUS Limited, HK 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 14167 38629 5441 AMAZON-02, US 174 4946 8767 851 COGENT-174, US 22773 4781 3116 368 ASN-CXA-ALL-CCI-22773-RDC, US 11492 4634 308 1032 CABLEONE, US 7155 3868 287 89 VIASAT-SP-BACKBONE, US 6327 3695 1321 70 SHAW, CA 396982 3325 4868 493 GOOGLE-CLOUD-PLATFORM, US 749 3143 54729 2394 DNIC-AS-00749, US 16625 2956 1277 2171 AKAMAI-AS, US 36352 2703 222 888 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 7266 1711 149 UNI2-AS, ES 39891 4969 306 72 ALJAWWALSTC-AS, SA 9009 3969 370 2259 M247, RO 20940 3944 3393 113 AKAMAI-ASN1, NL 12389 3170 2317 871 ROSTELECOM-AS PJSC Rostelecom. Technical 5384 2642 585 28 EMIRATES-INTERNET Emirates Internet, AE 212238 2568 183 1865 CDNEXT, GB 34984 2424 372 576 TELLCOM-AS, TR 8452 1714 1852 14 TE-AS TE-AS, EG 203020 1624 243 799 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 12753 3307 595 UNINET, MX 10620 3434 457 1108 Telmex Colombia S.A., CO 13999 2485 507 353 Mega Cable, S.A. de C.V., MX 11830 1991 369 65 Instituto Costarricense de Electricidad y 28573 1376 2433 265 Claro NXT Telecomunicacoes Ltda, BR 11664 1348 278 33 Techtel LMDS Comunicaciones Interactivas 3816 1339 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1257 371 22 Telefonica del Peru S.A.A., PE 22884 1057 67 359 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 1849 1534 341 ETISALAT-MISR, EG 20011 1327 205 344 NTT-DATA-Inc, ZA 24863 1267 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 36935 1110 524 47 Vodafone-, EG 37069 1100 1096 13 MOBINIL, EG 29571 1072 94 22 ORANGE-COTE-IVOIRE, CI 328608 575 53 167 Africa-on-Cloud-AS, ZA 36914 562 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 14167 38629 5441 AMAZON-02, US 9808 13487 8944 101 CHINAMOBILE-CN China Mobile Communication 8151 12753 3307 595 UNINET, MX 12479 7266 1711 149 UNI2-AS, ES 7545 6029 833 575 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 306 72 ALJAWWALSTC-AS, SA 174 4946 8767 851 COGENT-174, US 22773 4781 3116 368 ASN-CXA-ALL-CCI-22773-RDC, US 9498 4690 543 339 BBIL-AP BHARTI Airtel Ltd., IN 11492 4634 308 1032 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 13487 13386 CHINAMOBILE-CN China Mobile Communications Grou 8151 12753 12158 UNINET, MX 12479 7266 7117 UNI2-AS, ES 7545 6029 5454 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 4897 ALJAWWALSTC-AS, SA 22773 4781 4413 ASN-CXA-ALL-CCI-22773-RDC, US 9498 4690 4351 BBIL-AP BHARTI Airtel Ltd., IN 18403 4312 4288 FPT-AS-AP FPT Telecom Company, VN 174 4946 4095 COGENT-174, US 7552 4059 4030 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 54739 UNALLOCATED 8.44.198.0/23 13335 CLOUDFLARENET, 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 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: 3257 GTT-BACKBONE GTT, 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 /14:1206 /15:2117 /16:13794 /17:8388 /18:13875 /19:25377 /20:46682 /21:53755 /22:115762 /23:111375 /24:660562 /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 6898 12753 UNINET, MX 12479 6197 7266 UNI2-AS, ES 39891 3655 4969 ALJAWWALSTC-AS, SA 11492 3497 4634 CABLEONE, US 6327 3478 3695 SHAW, CA 22773 3049 4781 ASN-CXA-ALL-CCI-22773-RDC, US 7155 2827 3868 VIASAT-SP-BACKBONE, US 16509 2503 14167 AMAZON-02, US 30036 2308 2649 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) ---------------------------------------------- 1:2509 2:1640 3:990 4:9 5:5395 6:187 7:6 8:1535 9:15 11:172 12:1234 13:615 14:2648 15:418 16:275 17:392 18:919 20:615 21:4 22:188 23:8224 24:2776 25:2 27:2861 29:19 31:3544 32:39 34:88 35:292 36:4643 37:4578 38:11155 39:1245 40:441 41:4727 42:1916 43:3008 44:416 45:20412 46:5097 47:400 49:2182 50:2061 51:599 52:1258 54:234 55:1119 56:11 57:321 58:2348 59:1502 60:1178 61:3365 62:3154 63:1787 64:6209 65:2157 66:6121 67:3311 68:1531 69:4368 70:1034 71:629 72:3196 74:3014 75:1536 76:607 77:2901 78:1949 79:1803 80:2319 81:2130 82:4026 83:1530 84:2068 85:3692 86:1199 87:2363 88:1373 89:4667 90:827 91:8523 92:2920 93:3029 94:4368 95:4559 96:1492 97:317 98:956 99:789 100:69 101:1582 102:4803 103:32894 104:5486 105:1138 106:917 107:2816 108:1228 109:4270 110:2307 111:4097 112:2974 113:1992 114:2171 115:2383 116:2270 117:3291 118:3010 119:2163 120:2475 121:1570 122:2989 123:2566 124:1767 125:2999 126:125 128:1616 129:1014 130:1581 131:2343 132:773 133:461 134:1654 135:583 136:1615 137:1242 138:3139 139:1611 140:1786 141:1577 142:2432 143:2139 144:1434 145:634 146:2206 147:2173 148:2805 149:2982 150:1334 151:2624 152:2276 153:916 154:9971 155:2338 156:4643 157:2296 158:1498 159:2734 160:3783 161:2024 162:4017 163:2338 164:1988 165:2668 166:1292 167:2217 168:4045 169:814 170:5617 171:1117 172:4593 173:3465 174:897 175:1374 176:3889 177:5279 178:4357 179:2469 180:3044 181:4556 182:3908 183:2704 184:2084 185:22016 186:6045 187:4976 188:4651 189:4652 190:9961 191:1621 192:11478 193:9568 194:7990 195:5859 196:3633 197:3980 198:6128 199:6133 200:8427 201:6554 202:10995 203:10818 204:4692 205:3708 206:4439 207:3840 208:4407 209:5501 210:4995 211:2787 212:4980 213:4108 214:1062 215:54 216:7239 217:3642 218:1678 219:523 220:2196 221:1307 222:1002 223:3315 End of report