IPv4 R&E Routing Table Report 21:35 GMT Sat 23 May, 2026 IPv4 BGP Table (Global) as seen at USP. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/USP/ Analysis Summary ---------------- BGP routing table entries examined: 1048380 Prefixes after maximum aggregation (per Origin AS): 402373 Deaggregation factor: 2.61 Unique aggregates announced (without unneeded subnets): 517636 Number of IPv4 prefixes with a valid ROA: 657529 Number of IPv4 prefixes with an invalid ROA: 154 Number of IPv4 prefixes with no ROA: 390697 Total ASes present in the Internet Routing Table: 78563 Prefixes per ASN: 13.34 Origin-only ASes present in the Internet Routing Table: 67282 Origin ASes announcing only one prefix: 27467 Transit ASes present in the Internet Routing Table: 11281 Transit-only ASes present in the Internet Routing Table: 585 Paths with bogon ASNs present in the IPv4 Routing Table: 282 Average AS path length visible in the Internet Routing Table: 5.3 Max AS path length visible: 69 Max AS path prepend of ASN (269326) 61 Prefixes from unregistered ASNs in the Routing Table: 1254 Number of instances of unregistered ASNs: 1284 Number of 32-bit ASNs allocated by the RIRs: 49879 Number of 32-bit ASNs visible in the Routing Table: 40677 Prefixes from 32-bit ASNs in the Routing Table: 230544 Number of bogon 32-bit ASNs visible in the Routing Table: 82 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 433 Number of addresses announced to Internet: 3104183296 Equivalent to 185 /8s, 6 /16s and 20 /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: 343026 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 284404 Total APNIC prefixes after maximum aggregation: 83006 APNIC Deaggregation factor: 3.43 Prefixes being announced from the APNIC address blocks: 271034 Unique aggregates announced from the APNIC address blocks: 108010 APNIC Region origin ASes present in the Internet Routing Table: 15191 APNIC Prefixes per ASN: 17.84 APNIC Region origin ASes announcing only one prefix: 4644 APNIC Region transit ASes present in the Internet Routing Table: 2046 Average APNIC Region AS path length visible: 5.2 Max APNIC Region AS path length visible: 38 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10779 Number of APNIC addresses announced to Internet: 747698176 Equivalent to 44 /8s, 144 /16s and 248 /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: 304337 Total ARIN prefixes after maximum aggregation: 137088 ARIN Deaggregation factor: 2.22 Prefixes being announced from the ARIN address blocks: 303191 Unique aggregates announced from the ARIN address blocks: 147782 ARIN Region origin ASes present in the Internet Routing Table: 19432 ARIN Prefixes per ASN: 15.60 ARIN Region origin ASes announcing only one prefix: 7114 ARIN Region transit ASes present in the Internet Routing Table: 1976 Average ARIN Region AS path length visible: 5.0 Max ARIN Region AS path length visible: 36 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5593 Number of ARIN addresses announced to Internet: 1348198144 Equivalent to 80 /8s, 91 /16s and 223 /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, 393216-404380 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: 290785 Total RIPE prefixes after maximum aggregation: 143602 RIPE Deaggregation factor: 2.02 Prefixes being announced from the RIPE address blocks: 294198 Unique aggregates announced from the RIPE address blocks: 191722 RIPE Region origin ASes present in the Internet Routing Table: 29525 RIPE Prefixes per ASN: 9.96 RIPE Region origin ASes announcing only one prefix: 12240 RIPE Region transit ASes present in the Internet Routing Table: 4074 Average RIPE Region AS path length visible: 5.4 Max RIPE Region AS path length visible: 46 Number of RIPE region 32-bit ASNs visible in the Routing Table: 13460 Number of RIPE addresses announced to Internet: 733979136 Equivalent to 43 /8s, 191 /16s and 162 /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: 130083 Total LACNIC prefixes after maximum aggregation: 30862 LACNIC Deaggregation factor: 4.21 Prefixes being announced from the LACNIC address blocks: 124477 Unique aggregates announced from the LACNIC address blocks: 50351 LACNIC Region origin ASes present in the Internet Routing Table: 11406 LACNIC Prefixes per ASN: 10.91 LACNIC Region origin ASes announcing only one prefix: 2734 LACNIC Region transit ASes present in the Internet Routing Table: 2598 Average LACNIC Region AS path length visible: 6.3 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9446 Number of LACNIC addresses announced to Internet: 169737472 Equivalent to 10 /8s, 29 /16s and 253 /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: 37517 Total AfriNIC prefixes after maximum aggregation: 7072 AfriNIC Deaggregation factor: 5.31 Prefixes being announced from the AfriNIC address blocks: 55046 Unique aggregates announced from the AfriNIC address blocks: 19398 AfriNIC Region origin ASes present in the Internet Routing Table: 2036 AfriNIC Prefixes per ASN: 27.04 AfriNIC Region origin ASes announcing only one prefix: 735 AfriNIC Region transit ASes present in the Internet Routing Table: 393 Average AfriNIC Region AS path length visible: 6.0 Max AfriNIC Region AS path length visible: 63 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1399 Number of AfriNIC addresses announced to Internet: 104373760 Equivalent to 6 /8s, 56 /16s and 158 /24s AfriNIC AS Blocks 36864-37887, 327680-330751 & 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 13916 8761 121 CHINAMOBILE-CN China Mobile Communication 7545 5875 825 476 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4939 551 322 BBIL-AP BHARTI Airtel Ltd., IN 18403 4541 347 24 FPT-AP FPT Telecom Company, VN 7552 4064 1331 26 VIETEL-AS-AP Viettel Group, VN 7713 3695 1044 64 TELKOMNET-AS-AP PT Telekomunikasi Indones 56046 3543 887 177 CMNET-JIANGSU-AP China Mobile communicati 17561 3471 218 604 LCS-AS-AP LARUS Limited, HK 45899 3371 1868 98 VNPT-AS-VN VNPT Corp, VN 24560 2738 745 734 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14995 41427 5720 AMAZON-02 - Amazon.com, Inc., US 22773 4767 3114 366 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4592 305 1088 CABLEONE - CABLE ONE, INC., US 7155 3870 286 90 VIASAT-SP-BACKBONE - ViaSat,Inc., US 6327 3716 1305 74 SHAW - Shaw Communications, CA 396982 3350 4865 505 GOOGLE-CLOUD-PLATFORM - Google LLC, US 749 3138 54728 2389 DNIC-AS-00749 - United States Department 36352 3056 231 1027 AS-COLOCROSSING - HostPapa, US 7029 2635 2558 886 WINDSTREAM - Windstream Communications LL 30036 2580 357 532 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom C Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 12479 7134 1711 149 UNI2-AS, ES 39891 4975 307 72 ALJAWWALSTC-AS, SA 9009 4069 371 2472 M247, RO 20940 3914 3389 110 AKAMAI-ASN1, NL 12389 3140 2319 870 ROSTELECOM-AS PJSC Rostelecom. Technical 212238 2798 206 2065 CDNEXT, GB 34984 2489 367 583 TELLCOM-AS, TR 8452 1718 1852 14 TE-AS TE-AS, EG 203020 1653 252 829 HOSTROYALE, IN 13188 1607 100 27 TRIOLAN, UA Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 12755 3254 631 UNINET, MX 10620 3432 450 1101 Telmex Colombia S.A., CO 13999 2343 500 362 Mega Cable, S.A. de C.V., MX 11830 1935 369 65 Instituto Costarricense de Electricidad y 11664 1471 277 34 Techtel LMDS Comunicaciones Interactivas 28573 1364 2431 268 Claro NXT Telecomunicacoes Ltda, BR 3816 1342 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1224 371 22 INTEGRATEL PERU S.A.A., PE 22884 1077 71 364 TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. D 26615 1073 2392 100 TIM SA, BR Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 24835 2028 649 36 RAYA-AS, EG 36992 1860 1532 337 ETISALAT-MISR, EG 36935 1275 521 43 Vodafone-, EG 24863 1257 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 37069 1116 1100 11 MOBINIL, EG 29571 1085 70 18 ORANGE-COTE-IVOIRE, CI 20011 643 173 262 NTT-DATA-Inc, ZA 328608 636 57 172 Africa-on-Cloud-AS, ZA 15399 561 57 58 WANANCHI-, KE Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14995 41427 5720 AMAZON-02 - Amazon.com, Inc., US 9808 13916 8761 121 CHINAMOBILE-CN China Mobile Communication 8151 12755 3254 631 UNINET, MX 12479 7134 1711 149 UNI2-AS, ES 7545 5875 825 476 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4975 307 72 ALJAWWALSTC-AS, SA 9498 4939 551 322 BBIL-AP BHARTI Airtel Ltd., IN 22773 4767 3114 366 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4592 305 1088 CABLEONE - CABLE ONE, INC., US 18403 4541 347 24 FPT-AP FPT Telecom Company, VN Complete listing at https://bgp.nsrc.org/REN/USP/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 13916 13795 CHINAMOBILE-CN China Mobile Communications Grou 8151 12755 12124 UNINET, MX 12479 7134 6985 UNI2-AS, ES 7545 5875 5399 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4975 4903 ALJAWWALSTC-AS, SA 9498 4939 4617 BBIL-AP BHARTI Airtel Ltd., IN 18403 4541 4517 FPT-AP FPT Telecom Company, VN 22773 4767 4401 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications 7552 4064 4038 VIETEL-AS-AP Viettel Group, VN 20940 3914 3804 AKAMAI-ASN1, NL Complete listing at https://bgp.nsrc.org/REN/USP/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 46198 UNALLOCATED 8.10.6.0/24 23520 LIBERTY-NETWORKS - Colu 46198 UNALLOCATED 8.10.7.0/24 23520 LIBERTY-NETWORKS - Colu 395729 UNALLOCATED 8.28.58.0/24 32787 PROLEXIC-TECHNOLOGIES-D 395729 UNALLOCATED 8.28.60.0/24 32787 PROLEXIC-TECHNOLOGIES-D 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3 - Level 3 Parent 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE - Phonos 395195 UNALLOCATED 8.38.115.0/24 3356 LEVEL3 - Level 3 Parent 400273 UNALLOCATED 8.41.137.0/24 3356 LEVEL3 - Level 3 Parent 1782 UNALLOCATED 8.42.19.0/24 3356 LEVEL3 - Level 3 Parent 13342 UNALLOCATED 12.17.5.0/24 174 COGENT-174 - Cogent Com Complete listing at https://bgp.nsrc.org/REN/USP/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 23.131.100.0/24 Origin: 401541 OSIE - Osie, ZZ 23.131.100.0/24 Transit: 38733 CMCTELECOM-VN CMC Telecom Infrastructure 23.131.156.0/24 Origin: 401541 OSIE - Osie, ZZ 23.131.156.0/24 Transit: 38733 CMCTELECOM-VN CMC Telecom Infrastructure 23.131.212.0/24 Origin: 401541 OSIE - Osie, ZZ 23.131.212.0/24 Transit: 38733 CMCTELECOM-VN CMC Telecom Infrastructure 23.137.48.0/24 Origin: 16904 ARVIG-16904 - Arvig Enterprises Inc., US 23.137.48.0/24 Transit: 174 COGENT-174 - Cogent Communications, LLC, 23.137.200.0/24 Origin: 16276 OVH, FR 23.137.200.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/USP/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- !!Default route being announced!! /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:16 /9:14 /10:39 /11:95 /12:298 /13:583 /14:1190 /15:2118 /16:13603 /17:8289 /18:13357 /19:25482 /20:45782 /21:52415 /22:113498 /23:108605 /24:662995 /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 6976 12755 UNINET, MX 12479 6070 7134 UNI2-AS, ES 39891 3660 4975 ALJAWWALSTC-AS, SA 6327 3498 3716 SHAW - Shaw Communications, CA 11492 3469 4592 CABLEONE - CABLE ONE, INC., US 22773 3064 4767 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US 7155 2825 3870 VIASAT-SP-BACKBONE - ViaSat,Inc., US 16509 2718 14995 AMAZON-02 - Amazon.com, Inc., US 10620 2236 3432 Telmex Colombia S.A., CO 30036 2235 2580 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US Complete listing at https://bgp.nsrc.org/REN/USP/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2505 2:2077 3:998 4:5 5:5107 6:203 7:6 8:1475 9:63 11:172 12:1130 13:695 14:2719 15:467 16:215 17:441 18:920 20:611 21:4 22:188 23:8429 24:2776 25:2 27:2821 28:1 29:19 31:3585 32:36 34:87 35:284 36:4779 37:4446 38:9719 39:1307 40:412 41:4567 42:2174 43:3163 44:453 45:19772 46:4912 47:414 48:157 49:2250 50:2026 51:830 52:1333 54:282 55:1103 56:11 57:325 58:2347 59:1366 60:1175 61:3171 62:3143 63:1678 64:6384 65:2148 66:6130 67:3274 68:1514 69:4225 70:1056 71:617 72:3184 74:3074 75:1501 76:598 77:2938 78:2047 79:1795 80:2342 81:2269 82:4179 83:1459 84:2164 85:3852 86:1096 87:2592 88:1317 89:4775 90:794 91:8474 92:2778 93:3031 94:4416 95:4700 96:1445 97:308 98:950 99:841 100:70 101:1465 102:4623 103:32444 104:5430 105:844 106:919 107:2947 108:1281 109:4275 110:2280 111:4124 112:3163 113:2014 114:2533 115:2324 116:2071 117:3590 118:3046 119:2088 120:2739 121:1559 122:3023 123:2293 124:1653 125:2985 126:158 128:1606 129:976 130:1681 131:2439 132:887 133:502 134:1721 135:613 136:1468 137:1565 138:3414 139:1716 140:1841 141:1771 142:2557 143:2050 144:1785 145:636 146:2189 147:2246 148:2793 149:3163 150:1379 151:2924 152:2353 153:1705 154:9616 155:2280 156:5150 157:2446 158:1578 159:2868 160:3855 161:1985 162:4107 163:2603 164:2429 165:2682 166:1264 167:2341 168:4003 169:870 170:5589 171:1131 172:4809 173:3455 174:886 175:1358 176:3937 177:5060 178:4419 179:2368 180:3071 181:4597 182:4045 183:2846 184:2019 185:21867 186:6205 187:5051 188:4518 189:4523 190:9887 191:2007 192:11595 193:9617 194:7854 195:5837 196:3439 197:3241 198:6285 199:6068 200:8296 201:6431 202:10702 203:10686 204:4799 205:3738 206:4447 207:4003 208:4384 209:5507 210:4778 211:2690 212:5087 213:4126 214:1040 215:47 216:7307 217:3624 218:1801 219:413 220:2180 221:1321 222:938 223:3445 End of report