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 03 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: 1052981 Prefixes after maximum aggregation (per Origin AS): 395453 Deaggregation factor: 2.66 Unique aggregates announced (without unneeded subnets): 505625 Number of IPv4 prefixes with a valid ROA: 626586 Number of IPv4 prefixes with an invalid ROA: 2778 Number of IPv4 prefixes with no ROA: 423616 Total ASes present in the Internet Routing Table: 77888 Prefixes per ASN: 13.52 Origin-only ASes present in the Internet Routing Table: 66740 Origin ASes announcing only one prefix: 26808 Transit ASes present in the Internet Routing Table: 11148 Transit-only ASes present in the Internet Routing Table: 575 Paths with bogon ASNs present in the IPv4 Routing Table: 179 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) 206 Prefixes from unregistered ASNs in the Routing Table: 1013 Number of instances of unregistered ASNs: 1075 Number of 32-bit ASNs allocated by the RIRs: 48311 Number of 32-bit ASNs visible in the Routing Table: 39654 Prefixes from 32-bit ASNs in the Routing Table: 227398 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: 586 Number of addresses announced to Internet: 3107639552 Equivalent to 185 /8s, 58 /16s and 209 /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: 347112 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 284977 Total APNIC prefixes after maximum aggregation: 81496 APNIC Deaggregation factor: 3.50 Prefixes being announced from the APNIC address blocks: 271459 Unique aggregates announced from the APNIC address blocks: 106479 APNIC Region origin ASes present in the Internet Routing Table: 15022 APNIC Prefixes per ASN: 18.07 APNIC Region origin ASes announcing only one prefix: 4541 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: 37 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10567 Number of APNIC addresses announced to Internet: 755618048 Equivalent to 45 /8s, 9 /16s and 209 /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: 304458 Total ARIN prefixes after maximum aggregation: 135134 ARIN Deaggregation factor: 2.25 Prefixes being announced from the ARIN address blocks: 304939 Unique aggregates announced from the ARIN address blocks: 145613 ARIN Region origin ASes present in the Internet Routing Table: 19393 ARIN Prefixes per ASN: 15.72 ARIN Region origin ASes announcing only one prefix: 7070 ARIN Region transit ASes present in the Internet Routing Table: 1968 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: 5431 Number of ARIN addresses announced to Internet: 1342635008 Equivalent to 80 /8s, 6 /16s and 252 /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: 289930 Total RIPE prefixes after maximum aggregation: 140358 RIPE Deaggregation factor: 2.07 Prefixes being announced from the RIPE address blocks: 290619 Unique aggregates announced from the RIPE address blocks: 184405 RIPE Region origin ASes present in the Internet Routing Table: 29199 RIPE Prefixes per ASN: 9.95 RIPE Region origin ASes announcing only one prefix: 12067 RIPE Region transit ASes present in the Internet Routing Table: 4016 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 31 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12944 Number of RIPE addresses announced to Internet: 735412736 Equivalent to 43 /8s, 213 /16s and 130 /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: 133787 Total LACNIC prefixes after maximum aggregation: 30643 LACNIC Deaggregation factor: 4.37 Prefixes being announced from the LACNIC address blocks: 129337 Unique aggregates announced from the LACNIC address blocks: 49657 LACNIC Region origin ASes present in the Internet Routing Table: 11342 LACNIC Prefixes per ASN: 11.40 LACNIC Region origin ASes announcing only one prefix: 2432 LACNIC Region transit ASes present in the Internet Routing Table: 2586 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: 170287104 Equivalent to 10 /8s, 38 /16s and 96 /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: 38816 Total AfriNIC prefixes after maximum aggregation: 7134 AfriNIC Deaggregation factor: 5.44 Prefixes being announced from the AfriNIC address blocks: 56041 Unique aggregates announced from the AfriNIC address blocks: 18995 AfriNIC Region origin ASes present in the Internet Routing Table: 2011 AfriNIC Prefixes per ASN: 27.87 AfriNIC Region origin ASes announcing only one prefix: 698 AfriNIC Region transit ASes present in the Internet Routing Table: 385 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: 1372 Number of AfriNIC addresses announced to Internet: 103376896 Equivalent to 6 /8s, 41 /16s and 104 /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 13464 8944 101 CHINAMOBILE-CN China Mobile Communication 7545 6036 834 580 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4673 543 338 BBIL-AP BHARTI Airtel Ltd., IN 18403 4334 347 24 FPT-AS-AP FPT Telecom Company, VN 7552 4057 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3760 1044 65 TELKOMNET-AS-AP PT Telekomunikasi Indones 4538 3442 4193 76 ERX-CERNET-BKB China Education and Resear 56046 3398 831 184 CMNET-JIANGSU-AP China Mobile communicati 45899 3333 1868 98 VNPT-AS-VN VNPT Corp, VN 17561 3126 196 617 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 14067 38463 5422 AMAZON-02, US 174 4809 8768 861 COGENT-174, US 22773 4749 3113 375 ASN-CXA-ALL-CCI-22773-RDC, US 11492 4691 311 946 CABLEONE, US 7155 3868 287 89 VIASAT-SP-BACKBONE, US 6327 3688 1320 82 SHAW, CA 396982 3318 4867 492 GOOGLE-CLOUD-PLATFORM, US 749 3144 54729 2395 DNIC-AS-00749, US 16625 2974 1281 2180 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 7278 1711 149 UNI2-AS, ES 39891 4969 306 72 ALJAWWALSTC-AS, SA 9009 3994 371 2284 M247, RO 20940 3943 3393 113 AKAMAI-ASN1, NL 12389 3170 2317 871 ROSTELECOM-AS PJSC Rostelecom. Technical 5384 2639 585 28 EMIRATES-INTERNET Emirates Internet, AE 212238 2562 182 1861 CDNEXT, GB 34984 2421 371 574 TELLCOM-AS, TR 8452 1712 1852 14 TE-AS TE-AS, EG 203020 1619 242 783 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 12697 3293 593 UNINET, MX 10620 3434 457 1108 Telmex Colombia S.A., CO 13999 2488 506 351 Mega Cable, S.A. de C.V., MX 11830 1992 369 65 Instituto Costarricense de Electricidad y 28573 1370 2430 270 Claro NXT Telecomunicacoes Ltda, BR 11664 1356 278 33 Techtel LMDS Comunicaciones Interactivas 3816 1339 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1260 371 22 Telefonica del Peru S.A.A., PE 22884 1057 67 359 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1013 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 1847 1534 341 ETISALAT-MISR, EG 20011 1327 205 344 NTT-DATA-Inc, ZA 24863 1268 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 36935 1109 523 46 Vodafone-, EG 37069 1100 1096 13 MOBINIL, EG 29571 1072 94 22 ORANGE-COTE-IVOIRE, CI 328608 569 53 162 Africa-on-Cloud-AS, ZA 3741 559 725 326 NTT-DATA-Inc, ZA 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 14067 38463 5422 AMAZON-02, US 9808 13464 8944 101 CHINAMOBILE-CN China Mobile Communication 8151 12697 3293 593 UNINET, MX 12479 7278 1711 149 UNI2-AS, ES 7545 6036 834 580 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 306 72 ALJAWWALSTC-AS, SA 174 4809 8768 861 COGENT-174, US 22773 4749 3113 375 ASN-CXA-ALL-CCI-22773-RDC, US 11492 4691 311 946 CABLEONE, US 9498 4673 543 338 BBIL-AP BHARTI Airtel Ltd., IN 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 13464 13363 CHINAMOBILE-CN China Mobile Communications Grou 8151 12697 12104 UNINET, MX 12479 7278 7129 UNI2-AS, ES 7545 6036 5456 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4969 4897 ALJAWWALSTC-AS, SA 22773 4749 4374 ASN-CXA-ALL-CCI-22773-RDC, US 9498 4673 4335 BBIL-AP BHARTI Airtel Ltd., IN 18403 4334 4310 FPT-AS-AP FPT Telecom Company, VN 7552 4057 4028 VIETEL-AS-AP Viettel Group, VN 174 4809 3948 COGENT-174, US 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 21861 UNALLOCATED 12.37.59.0/24 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 /10:41 /11:94 /12:302 /13:581 /14:1207 /15:2120 /16:13789 /17:8383 /18:13931 /19:25364 /20:46675 /21:53693 /22:115501 /23:111473 /24:659797 /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 6869 12697 UNINET, MX 12479 6209 7278 UNI2-AS, ES 39891 3655 4969 ALJAWWALSTC-AS, SA 11492 3536 4691 CABLEONE, US 6327 3477 3688 SHAW, CA 22773 3055 4749 ASN-CXA-ALL-CCI-22773-RDC, US 7155 2827 3868 VIASAT-SP-BACKBONE, US 16509 2480 14067 AMAZON-02, US 30036 2306 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) ---------------------------------------------- 1:2498 2:1669 3:980 4:10 5:5370 6:187 7:6 8:1537 9:15 11:172 12:1234 13:618 14:2644 15:418 16:275 17:388 18:915 20:612 21:4 22:188 23:8202 24:2778 25:2 27:2855 29:19 31:3534 32:39 33:1 34:90 35:290 36:4662 37:4611 38:11136 39:1231 40:442 41:4723 42:1914 43:2986 44:415 45:20402 46:5119 47:401 49:2178 50:2061 51:599 52:1254 54:230 55:1123 56:11 57:318 58:2345 59:1503 60:1178 61:3330 62:3146 63:1786 64:6189 65:2156 66:6124 67:3313 68:1537 69:4372 70:1037 71:629 72:3202 74:3005 75:1537 76:607 77:2892 78:1940 79:1807 80:2326 81:2134 82:3980 83:1527 84:2067 85:3685 86:1198 87:2366 88:1374 89:4671 90:834 91:8537 92:2909 93:3032 94:4399 95:4588 96:1500 97:317 98:958 99:791 100:68 101:1326 102:4776 103:32856 104:5493 105:1135 106:931 107:2817 108:1227 109:4309 110:2309 111:4081 112:2888 113:1997 114:2105 115:2390 116:2292 117:3279 118:3006 119:2164 120:2467 121:1564 122:2988 123:2779 124:1767 125:2989 126:125 128:1608 129:1002 130:1582 131:2351 132:760 133:462 134:1650 135:586 136:1515 137:1231 138:3137 139:1607 140:1788 141:1580 142:2445 143:2147 144:1411 145:633 146:2203 147:2153 148:2799 149:2998 150:1338 151:2617 152:2280 153:912 154:9848 155:2327 156:4596 157:2294 158:1491 159:2730 160:3782 161:2030 162:4025 163:2353 164:1982 165:2656 166:1313 167:2216 168:4031 169:813 170:5642 171:1118 172:4555 173:3459 174:903 175:1371 176:3901 177:5299 178:4426 179:2470 180:2901 181:4580 182:3898 183:2682 184:2101 185:22012 186:6051 187:4975 188:4656 189:4638 190:9940 191:1633 192:11460 193:9576 194:8018 195:5832 196:3636 197:3978 198:6121 199:6128 200:8449 201:6542 202:11047 203:10816 204:4694 205:3717 206:4459 207:3853 208:4409 209:5508 210:4985 211:2780 212:4994 213:4106 214:1060 215:54 216:7223 217:3641 218:1676 219:521 220:2197 221:1302 222:902 223:3298 End of report