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 27 Sep, 2025 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: 1040075 Prefixes after maximum aggregation (per Origin AS): 390590 Deaggregation factor: 2.66 Unique aggregates announced (without unneeded subnets): 495095 Number of IPv4 prefixes with a valid ROA: 596321 Number of IPv4 prefixes with an invalid ROA: 2770 Number of IPv4 prefixes with no ROA: 440984 Total ASes present in the Internet Routing Table: 77522 Prefixes per ASN: 13.42 Origin-only ASes present in the Internet Routing Table: 66490 Origin ASes announcing only one prefix: 26510 Transit ASes present in the Internet Routing Table: 11032 Transit-only ASes present in the Internet Routing Table: 551 Paths with bogon ASNs present in the IPv4 Routing Table: 150 Average AS path length visible in the Internet Routing Table: 5.0 Max AS path length visible: 57 Max AS path prepend of ASN ( 37447) 54 Prefixes from unregistered ASNs in the Routing Table: 1056 Number of instances of unregistered ASNs: 1095 Number of 32-bit ASNs allocated by the RIRs: 47563 Number of 32-bit ASNs visible in the Routing Table: 39129 Prefixes from 32-bit ASNs in the Routing Table: 222826 Number of bogon 32-bit ASNs visible in the Routing Table: 110 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 445 Number of addresses announced to Internet: 3113481216 Equivalent to 185 /8s, 147 /16s and 244 /24s Percentage of available address space announced: 84.1 Percentage of allocated address space announced: 84.1 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: 343820 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 275261 Total APNIC prefixes after maximum aggregation: 79721 APNIC Deaggregation factor: 3.45 Prefixes being announced from the APNIC address blocks: 265072 Unique aggregates announced from the APNIC address blocks: 105667 APNIC Region origin ASes present in the Internet Routing Table: 14829 APNIC Prefixes per ASN: 17.88 APNIC Region origin ASes announcing only one prefix: 4469 APNIC Region transit ASes present in the Internet Routing Table: 1975 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: 10388 Number of APNIC addresses announced to Internet: 751857408 Equivalent to 44 /8s, 208 /16s and 111 /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: 299396 Total ARIN prefixes after maximum aggregation: 134051 ARIN Deaggregation factor: 2.23 Prefixes being announced from the ARIN address blocks: 300958 Unique aggregates announced from the ARIN address blocks: 142840 ARIN Region origin ASes present in the Internet Routing Table: 19327 ARIN Prefixes per ASN: 15.57 ARIN Region origin ASes announcing only one prefix: 7087 ARIN Region transit ASes present in the Internet Routing Table: 1949 Average ARIN Region AS path length visible: 4.8 Max ARIN Region AS path length visible: 25 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5350 Number of ARIN addresses announced to Internet: 1352855040 Equivalent to 80 /8s, 162 /16s and 238 /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: 287770 Total RIPE prefixes after maximum aggregation: 138729 RIPE Deaggregation factor: 2.07 Prefixes being announced from the RIPE address blocks: 286953 Unique aggregates announced from the RIPE address blocks: 180540 RIPE Region origin ASes present in the Internet Routing Table: 29159 RIPE Prefixes per ASN: 9.84 RIPE Region origin ASes announcing only one prefix: 12088 RIPE Region transit ASes present in the Internet Routing Table: 4005 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 30 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12780 Number of RIPE addresses announced to Internet: 733540352 Equivalent to 43 /8s, 184 /16s and 240 /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: 138424 Total LACNIC prefixes after maximum aggregation: 30306 LACNIC Deaggregation factor: 4.57 Prefixes being announced from the LACNIC address blocks: 134366 Unique aggregates announced from the LACNIC address blocks: 49361 LACNIC Region origin ASes present in the Internet Routing Table: 11305 LACNIC Prefixes per ASN: 11.89 LACNIC Region origin ASes announcing only one prefix: 2199 LACNIC Region transit ASes present in the Internet Routing Table: 2519 Average LACNIC Region AS path length visible: 5.6 Max LACNIC Region AS path length visible: 37 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9266 Number of LACNIC addresses announced to Internet: 170796288 Equivalent to 10 /8s, 46 /16s and 37 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-274844 + 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: 38168 Total AfriNIC prefixes after maximum aggregation: 7058 AfriNIC Deaggregation factor: 5.41 Prefixes being announced from the AfriNIC address blocks: 52281 Unique aggregates announced from the AfriNIC address blocks: 16293 AfriNIC Region origin ASes present in the Internet Routing Table: 1982 AfriNIC Prefixes per ASN: 26.38 AfriNIC Region origin ASes announcing only one prefix: 667 AfriNIC Region transit ASes present in the Internet Routing Table: 392 Average AfriNIC Region AS path length visible: 5.0 Max AfriNIC Region AS path length visible: 57 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1345 Number of AfriNIC addresses announced to Internet: 104193280 Equivalent to 6 /8s, 53 /16s and 221 /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 13681 8759 113 CHINAMOBILE-CN China Mobile Communication 7545 6158 834 599 TPG-INTERNET-AP TPG Telecom Limited, AU 18403 4481 347 26 FPT-AS-AP FPT Telecom Company, VN 9498 4473 536 313 BBIL-AP BHARTI Airtel Ltd., IN 7552 3952 1332 28 VIETEL-AS-AP Viettel Group, VN 7713 3744 1044 67 TELKOMNET-AS-AP PT Telekomunikasi Indones 45899 3320 1869 101 VNPT-AS-VN VNPT Corp, VN 56046 3116 827 180 CMNET-JIANGSU-AP China Mobile communicati 24560 2926 862 505 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 9304 2269 496 1434 HUTCHISON-AS-AP HGC Global Communications 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 14435 40912 5372 AMAZON-02, US 174 5128 8774 827 COGENT-174, US 11492 4746 320 804 CABLEONE, US 22773 3958 3061 312 ASN-CXA-ALL-CCI-22773-RDC, US 7155 3875 287 91 VIASAT-SP-BACKBONE, US 6327 3674 1320 81 SHAW, CA 396982 3270 4824 459 GOOGLE-CLOUD-PLATFORM, US 749 3221 54766 2472 DNIC-AS-00749, US 4155 3067 237 1700 USDA-1, US 16625 3060 1304 2218 AKAMAI-AS, 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 7454 1711 149 UNI2-AS, ES 39891 4798 293 63 ALJAWWALSTC-AS, SA 20940 4039 3395 127 AKAMAI-ASN1, NL 9009 3993 372 2216 M247, RO 12389 3127 2315 868 ROSTELECOM-AS PJSC Rostelecom. Technical 5384 2630 585 28 EMIRATES-INTERNET Emirates Internet, AE 212238 2438 173 1762 CDNEXT, GB 34984 2412 363 573 TELLCOM-AS, TR 203020 1877 198 874 HOSTROYALE, IN 8452 1626 1852 14 TE-AS TE-AS, EG 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 12412 3278 576 UNINET, MX 10620 3503 474 1047 Telmex Colombia S.A., CO 13999 2543 511 346 Mega Cable, S.A. de C.V., MX 11830 1989 369 64 Instituto Costarricense de Electricidad y 28573 1578 2433 261 Claro NXT Telecomunicacoes Ltda, BR 3816 1354 789 206 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 11664 1231 278 33 Techtel LMDS Comunicaciones Interactivas 6147 1178 371 23 Telefonica del Peru S.A.A., PE 22884 1062 70 370 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1010 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 1846 652 28 RAYA-AS, EG 36992 1513 1498 384 ETISALAT-MISR, EG 20011 1325 205 344 NTT-DATA-Inc, ZA 36903 1250 554 97 MT-MPLS, MA 24863 1247 389 20 LINKdotNET-AS, EG 29571 1185 102 53 ORANGE-COTE-IVOIRE, CI 37069 1085 1096 13 MOBINIL, EG 36935 1077 522 45 Vodafone-, EG 3741 566 725 321 NTT-DATA-Inc, ZA 36914 565 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 14435 40912 5372 AMAZON-02, US 9808 13681 8759 113 CHINAMOBILE-CN China Mobile Communication 8151 12412 3278 576 UNINET, MX 12479 7454 1711 149 UNI2-AS, ES 7545 6158 834 599 TPG-INTERNET-AP TPG Telecom Limited, AU 174 5128 8774 827 COGENT-174, US 39891 4798 293 63 ALJAWWALSTC-AS, SA 11492 4746 320 804 CABLEONE, US 18403 4481 347 26 FPT-AS-AP FPT Telecom Company, VN 9498 4473 536 313 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 13681 13568 CHINAMOBILE-CN China Mobile Communications Grou 8151 12412 11836 UNINET, MX 12479 7454 7305 UNI2-AS, ES 7545 6158 5559 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4798 4735 ALJAWWALSTC-AS, SA 18403 4481 4455 FPT-AS-AP FPT Telecom Company, VN 174 5128 4301 COGENT-174, US 9498 4473 4160 BBIL-AP BHARTI Airtel Ltd., IN 11492 4746 3942 CABLEONE, US 7552 3952 3924 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 53775 UNALLOCATED 8.20.88.0/24 7029 WINDSTREAM, US 396146 UNALLOCATED 8.21.227.0/24 3356 LEVEL3, US 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 54338 UNALLOCATED 8.33.241.0/24 3356 LEVEL3, US 395195 UNALLOCATED 8.38.115.0/24 33132 CROWNCASTLE-AS33132, US 1782 UNALLOCATED 8.42.19.0/24 3356 LEVEL3, US 395438 UNALLOCATED 8.42.206.0/24 3356 LEVEL3, US 54739 UNALLOCATED 8.44.198.0/23 13335 CLOUDFLARENET, 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 14.192.20.0/22 Origin: 26658 HENGTONG-IDC-LLC, US 14.192.20.0/22 Transit: 21859 ZEN-ECN, US 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 23.147.240.0/24 Origin: 32302 RESERVED, ZZ 23.147.240.0/24 Transit: 32787 PROLEXIC-TECHNOLOGIES-DDOS-MITIGATION-NE 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 /11:93 /12:302 /13:584 /14:1214 /15:2167 /16:13882 /17:8363 /18:13762 /19:25198 /20:45533 /21:53450 /22:115275 /23:111412 /24:648769 /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 6597 12412 UNINET, MX 12479 6427 7454 UNI2-AS, ES 11492 3560 4746 CABLEONE, US 39891 3489 4798 ALJAWWALSTC-AS, SA 6327 3465 3674 SHAW, CA 7155 2833 3875 VIASAT-SP-BACKBONE, US 22773 2519 3958 ASN-CXA-ALL-CCI-22773-RDC, US 16509 2455 14435 AMAZON-02, US 30036 2295 2637 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2221 3503 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) ---------------------------------------------- 1:2449 2:1682 3:944 4:10 5:5236 6:170 7:6 8:1558 9:6 11:172 12:1246 13:555 14:2638 15:401 16:303 17:391 18:913 20:592 21:4 22:188 23:7966 24:2805 25:2 27:2850 29:19 31:3537 32:38 33:1 34:88 35:276 36:4459 37:4673 38:10726 39:1097 40:297 41:4615 42:1990 43:2867 44:387 45:20561 46:5272 47:375 49:2188 50:2059 51:594 52:1607 54:363 55:1045 56:11 57:295 58:2292 59:1365 60:1194 61:3136 62:3116 63:1783 64:5704 65:2162 66:5026 67:3154 68:1121 69:4092 70:1050 71:644 72:3038 74:2873 75:1519 76:607 77:2898 78:1936 79:1778 80:2273 81:2140 82:3468 83:1524 84:2000 85:3541 86:1193 87:2416 88:1380 89:4697 90:814 91:8535 92:2868 93:3003 94:4345 95:4621 96:1528 97:312 98:954 99:765 100:71 101:1484 102:4768 103:33367 104:5390 105:1084 106:880 107:2661 108:1232 109:4289 110:2252 111:3786 112:2661 113:1894 114:2005 115:2418 116:2149 117:2943 118:3076 119:1996 120:2279 121:1383 122:2872 123:2552 124:1777 125:2863 126:91 128:1612 129:1008 130:1303 131:2323 132:804 133:461 134:1616 135:412 136:1505 137:1144 138:3178 139:1618 140:1648 141:1570 142:1936 143:2130 144:1291 145:644 146:2190 147:2146 148:2740 149:2985 150:1280 151:2561 152:2424 153:642 154:7881 155:2071 156:3516 157:2100 158:1421 159:2590 160:3642 161:2022 162:3968 163:2336 164:1999 165:2613 166:1566 167:2130 168:4144 169:796 170:5824 171:1015 172:4291 173:3441 174:905 175:1376 176:3969 177:5899 178:4463 179:2724 180:2701 181:4418 182:3734 183:2652 184:2112 185:21992 186:5957 187:5140 188:4410 189:4703 190:10083 191:1769 192:11464 193:9544 194:7960 195:5770 196:3692 197:4037 198:6155 199:8765 200:8650 201:6647 202:10699 203:10888 204:4596 205:3634 206:4588 207:3567 208:4345 209:5371 210:4855 211:2702 212:4835 213:3953 214:1036 215:52 216:7001 217:3502 218:1585 219:423 220:2195 221:1267 222:752 223:3080 End of report