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 20 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: 1038562 Prefixes after maximum aggregation (per Origin AS): 390330 Deaggregation factor: 2.66 Unique aggregates announced (without unneeded subnets): 494458 Number of IPv4 prefixes with a valid ROA: 594860 Number of IPv4 prefixes with an invalid ROA: 2791 Number of IPv4 prefixes with no ROA: 440911 Total ASes present in the Internet Routing Table: 77502 Prefixes per ASN: 13.40 Origin-only ASes present in the Internet Routing Table: 66456 Origin ASes announcing only one prefix: 26483 Transit ASes present in the Internet Routing Table: 11046 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: 1141 Number of instances of unregistered ASNs: 1180 Number of 32-bit ASNs allocated by the RIRs: 47507 Number of 32-bit ASNs visible in the Routing Table: 39084 Prefixes from 32-bit ASNs in the Routing Table: 222754 Number of bogon 32-bit ASNs visible in the Routing Table: 113 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 446 Number of addresses announced to Internet: 3113614848 Equivalent to 185 /8s, 149 /16s and 254 /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: 343283 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 274365 Total APNIC prefixes after maximum aggregation: 79488 APNIC Deaggregation factor: 3.45 Prefixes being announced from the APNIC address blocks: 264395 Unique aggregates announced from the APNIC address blocks: 105544 APNIC Region origin ASes present in the Internet Routing Table: 14828 APNIC Prefixes per ASN: 17.83 APNIC Region origin ASes announcing only one prefix: 4477 APNIC Region transit ASes present in the Internet Routing Table: 1980 Average APNIC Region AS path length visible: 5.4 Max APNIC Region AS path length visible: 37 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10385 Number of APNIC addresses announced to Internet: 751170816 Equivalent to 44 /8s, 197 /16s and 245 /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: 298963 Total ARIN prefixes after maximum aggregation: 134229 ARIN Deaggregation factor: 2.23 Prefixes being announced from the ARIN address blocks: 300489 Unique aggregates announced from the ARIN address blocks: 142614 ARIN Region origin ASes present in the Internet Routing Table: 19319 ARIN Prefixes per ASN: 15.55 ARIN Region origin ASes announcing only one prefix: 7071 ARIN Region transit ASes present in the Internet Routing Table: 1960 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: 5334 Number of ARIN addresses announced to Internet: 1353713408 Equivalent to 80 /8s, 176 /16s and 7 /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: 287250 Total RIPE prefixes after maximum aggregation: 138562 RIPE Deaggregation factor: 2.07 Prefixes being announced from the RIPE address blocks: 286194 Unique aggregates announced from the RIPE address blocks: 180179 RIPE Region origin ASes present in the Internet Routing Table: 29139 RIPE Prefixes per ASN: 9.82 RIPE Region origin ASes announcing only one prefix: 12086 RIPE Region transit ASes present in the Internet Routing Table: 4003 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 29 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12752 Number of RIPE addresses announced to Internet: 733152256 Equivalent to 43 /8s, 179 /16s and 4 /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: 138731 Total LACNIC prefixes after maximum aggregation: 30280 LACNIC Deaggregation factor: 4.58 Prefixes being announced from the LACNIC address blocks: 134723 Unique aggregates announced from the LACNIC address blocks: 49381 LACNIC Region origin ASes present in the Internet Routing Table: 11311 LACNIC Prefixes per ASN: 11.91 LACNIC Region origin ASes announcing only one prefix: 2191 LACNIC Region transit ASes present in the Internet Routing Table: 2529 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: 9271 Number of LACNIC addresses announced to Internet: 170796544 Equivalent to 10 /8s, 46 /16s and 38 /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: 38112 Total AfriNIC prefixes after maximum aggregation: 7027 AfriNIC Deaggregation factor: 5.42 Prefixes being announced from the AfriNIC address blocks: 52315 Unique aggregates announced from the AfriNIC address blocks: 16346 AfriNIC Region origin ASes present in the Internet Routing Table: 1977 AfriNIC Prefixes per ASN: 26.46 AfriNIC Region origin ASes announcing only one prefix: 658 AfriNIC Region transit ASes present in the Internet Routing Table: 391 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: 1342 Number of AfriNIC addresses announced to Internet: 104543488 Equivalent to 6 /8s, 59 /16s and 53 /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 13509 8759 113 CHINAMOBILE-CN China Mobile Communication 7545 6157 837 598 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4472 536 315 BBIL-AP BHARTI Airtel Ltd., IN 18403 4449 347 26 FPT-AS-AP FPT Telecom Company, VN 7552 3942 1332 27 VIETEL-AS-AP Viettel Group, VN 7713 3739 1044 67 TELKOMNET-AS-AP PT Telekomunikasi Indones 45899 3319 1869 101 VNPT-AS-VN VNPT Corp, VN 56046 3074 827 180 CMNET-JIANGSU-AP China Mobile communicati 24560 2923 863 505 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 4755 2206 429 197 TATACOMM-AS TATA Communications formerly 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 14487 40912 5364 AMAZON-02, US 174 5141 8775 831 COGENT-174, US 11492 4737 320 807 CABLEONE, US 22773 3951 3060 310 ASN-CXA-ALL-CCI-22773-RDC, US 7155 3875 287 91 VIASAT-SP-BACKBONE, US 6327 3673 1320 81 SHAW, CA 396982 3264 4823 458 GOOGLE-CLOUD-PLATFORM, US 749 3221 54766 2472 DNIC-AS-00749, US 16625 3077 1306 2217 AKAMAI-AS, US 4155 3032 235 1726 USDA-1, 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 7463 1711 149 UNI2-AS, ES 39891 4798 293 63 ALJAWWALSTC-AS, SA 20940 4038 3395 128 AKAMAI-ASN1, NL 9009 3983 372 2223 M247, RO 12389 3126 2315 868 ROSTELECOM-AS PJSC Rostelecom. Technical 5384 2633 585 29 EMIRATES-INTERNET Emirates Internet, AE 212238 2419 172 1752 CDNEXT, GB 34984 2415 363 574 TELLCOM-AS, TR 203020 1976 231 918 HOSTROYALE, IN 8452 1639 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 12381 3275 579 UNINET, MX 10620 3494 473 1048 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 1580 2433 261 Claro NXT Telecomunicacoes Ltda, BR 3816 1353 789 205 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 11664 1228 278 33 Techtel LMDS Comunicaciones Interactivas 6147 1180 371 23 Telefonica del Peru S.A.A., PE 22884 1065 71 363 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1010 2487 55 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 1821 652 28 RAYA-AS, EG 36992 1511 1498 383 ETISALAT-MISR, EG 20011 1325 205 344 NTT-DATA-Inc, ZA 36903 1250 554 97 MT-MPLS, MA 24863 1248 389 20 LINKdotNET-AS, EG 29571 1185 102 51 ORANGE-COTE-IVOIRE, CI 37069 1085 1096 13 MOBINIL, EG 36935 1029 522 45 Vodafone-, EG 36914 575 82 3 KENET-AS, KE 3741 566 725 321 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 14487 40912 5364 AMAZON-02, US 9808 13509 8759 113 CHINAMOBILE-CN China Mobile Communication 8151 12381 3275 579 UNINET, MX 12479 7463 1711 149 UNI2-AS, ES 7545 6157 837 598 TPG-INTERNET-AP TPG Telecom Limited, AU 174 5141 8775 831 COGENT-174, US 39891 4798 293 63 ALJAWWALSTC-AS, SA 11492 4737 320 807 CABLEONE, US 9498 4472 536 315 BBIL-AP BHARTI Airtel Ltd., IN 18403 4449 347 26 FPT-AS-AP FPT Telecom Company, VN 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 13509 13396 CHINAMOBILE-CN China Mobile Communications Grou 8151 12381 11802 UNINET, MX 12479 7463 7314 UNI2-AS, ES 7545 6157 5559 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4798 4735 ALJAWWALSTC-AS, SA 18403 4449 4423 FPT-AS-AP FPT Telecom Company, VN 174 5141 4310 COGENT-174, US 9498 4472 4157 BBIL-AP BHARTI Airtel Ltd., IN 11492 4737 3930 CABLEONE, US 7552 3942 3915 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 /12:299 /13:581 /14:1216 /15:2176 /16:13875 /17:8361 /18:13762 /19:25183 /20:45487 /21:53446 /22:115131 /23:111338 /24:647543 /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 6567 12381 UNINET, MX 12479 6431 7463 UNI2-AS, ES 11492 3552 4737 CABLEONE, US 39891 3489 4798 ALJAWWALSTC-AS, SA 6327 3464 3673 SHAW, CA 7155 2833 3875 VIASAT-SP-BACKBONE, US 22773 2513 3951 ASN-CXA-ALL-CCI-22773-RDC, US 16509 2458 14487 AMAZON-02, US 30036 2295 2636 MEDIACOM-ENTERPRISE-BUSINESS, US 10620 2212 3494 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) ---------------------------------------------- 1:2439 2:1669 3:940 4:10 5:5215 6:165 7:6 8:1566 9:6 11:172 12:1248 13:570 14:2628 15:399 16:303 17:389 18:909 20:591 21:4 22:188 23:7969 24:2810 25:2 27:2858 29:19 31:3542 32:39 33:1 34:88 35:271 36:4385 37:4670 38:10659 39:1082 40:287 41:4605 42:1980 43:2871 44:390 45:20610 46:5259 47:374 49:2181 50:2058 51:594 52:1612 54:374 55:1097 56:11 57:296 58:2281 59:1363 60:1193 61:3100 62:3096 63:1787 64:5708 65:2143 66:4999 67:3153 68:1112 69:4079 70:1050 71:645 72:3017 74:2877 75:1521 76:607 77:2901 78:1937 79:1779 80:2269 81:2119 82:3362 83:1514 84:1990 85:3517 86:1197 87:2417 88:1379 89:4665 90:810 91:8543 92:2871 93:3006 94:4321 95:4610 96:1520 97:312 98:953 99:760 100:71 101:1482 102:4752 103:33352 104:5334 105:1084 106:881 107:2661 108:1243 109:4267 110:2248 111:3746 112:2623 113:1887 114:2008 115:2421 116:2147 117:2870 118:3077 119:1988 120:2282 121:1387 122:2841 123:2558 124:1774 125:2908 126:91 128:1611 129:1007 130:1317 131:2321 132:806 133:461 134:1612 135:409 136:1497 137:1153 138:3196 139:1613 140:1652 141:1560 142:1942 143:2150 144:1288 145:641 146:2194 147:2137 148:2748 149:2985 150:1283 151:2544 152:2375 153:641 154:7875 155:2065 156:3521 157:2102 158:1432 159:2569 160:3638 161:2006 162:3959 163:2340 164:1983 165:2605 166:1566 167:2127 168:4159 169:795 170:5807 171:1012 172:4277 173:3438 174:906 175:1369 176:3960 177:6000 178:4414 179:2766 180:2691 181:4431 182:3729 183:2600 184:2119 185:21979 186:6012 187:5201 188:4411 189:4717 190:10095 191:1772 192:11464 193:9539 194:7972 195:5751 196:3696 197:4038 198:6162 199:8735 200:8632 201:6618 202:10676 203:10873 204:4577 205:3642 206:4580 207:3546 208:4325 209:5320 210:4858 211:2702 212:4763 213:3920 214:1036 215:52 216:6947 217:3495 218:1524 219:423 220:2157 221:1265 222:752 223:3035 End of report