IPv4 R&E Routing Table Report 21:35 GMT Wed 20 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: 1047687 Prefixes after maximum aggregation (per Origin AS): 401941 Deaggregation factor: 2.61 Unique aggregates announced (without unneeded subnets): 517445 Number of IPv4 prefixes with a valid ROA: 654373 Number of IPv4 prefixes with an invalid ROA: 152 Number of IPv4 prefixes with no ROA: 393162 Total ASes present in the Internet Routing Table: 78540 Prefixes per ASN: 13.34 Origin-only ASes present in the Internet Routing Table: 67248 Origin ASes announcing only one prefix: 27434 Transit ASes present in the Internet Routing Table: 11292 Transit-only ASes present in the Internet Routing Table: 592 Paths with bogon ASNs present in the IPv4 Routing Table: 284 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: 1266 Number of instances of unregistered ASNs: 1296 Number of 32-bit ASNs allocated by the RIRs: 49818 Number of 32-bit ASNs visible in the Routing Table: 40650 Prefixes from 32-bit ASNs in the Routing Table: 230127 Number of bogon 32-bit ASNs visible in the Routing Table: 84 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 441 Number of addresses announced to Internet: 3103434240 Equivalent to 184 /8s, 250 /16s and 166 /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: 343030 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 284117 Total APNIC prefixes after maximum aggregation: 82980 APNIC Deaggregation factor: 3.42 Prefixes being announced from the APNIC address blocks: 270625 Unique aggregates announced from the APNIC address blocks: 107975 APNIC Region origin ASes present in the Internet Routing Table: 15203 APNIC Prefixes per ASN: 17.80 APNIC Region origin ASes announcing only one prefix: 4650 APNIC Region transit ASes present in the Internet Routing Table: 2049 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: 10785 Number of APNIC addresses announced to Internet: 747623680 Equivalent to 44 /8s, 143 /16s and 213 /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: 304127 Total ARIN prefixes after maximum aggregation: 136929 ARIN Deaggregation factor: 2.22 Prefixes being announced from the ARIN address blocks: 302911 Unique aggregates announced from the ARIN address blocks: 147717 ARIN Region origin ASes present in the Internet Routing Table: 19427 ARIN Prefixes per ASN: 15.59 ARIN Region origin ASes announcing only one prefix: 7107 ARIN Region transit ASes present in the Internet Routing Table: 1973 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: 5585 Number of ARIN addresses announced to Internet: 1347622400 Equivalent to 80 /8s, 83 /16s and 22 /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: 290504 Total RIPE prefixes after maximum aggregation: 143389 RIPE Deaggregation factor: 2.03 Prefixes being announced from the RIPE address blocks: 294145 Unique aggregates announced from the RIPE address blocks: 191707 RIPE Region origin ASes present in the Internet Routing Table: 29504 RIPE Prefixes per ASN: 9.97 RIPE Region origin ASes announcing only one prefix: 12230 RIPE Region transit ASes present in the Internet Routing Table: 4077 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: 13443 Number of RIPE addresses announced to Internet: 733959936 Equivalent to 43 /8s, 191 /16s and 87 /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: 130144 Total LACNIC prefixes after maximum aggregation: 30824 LACNIC Deaggregation factor: 4.22 Prefixes being announced from the LACNIC address blocks: 124554 Unique aggregates announced from the LACNIC address blocks: 50345 LACNIC Region origin ASes present in the Internet Routing Table: 11396 LACNIC Prefixes per ASN: 10.93 LACNIC Region origin ASes announcing only one prefix: 2710 LACNIC Region transit ASes present in the Internet Routing Table: 2607 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: 9442 Number of LACNIC addresses announced to Internet: 169709568 Equivalent to 10 /8s, 29 /16s and 144 /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: 37529 Total AfriNIC prefixes after maximum aggregation: 7075 AfriNIC Deaggregation factor: 5.30 Prefixes being announced from the AfriNIC address blocks: 55010 Unique aggregates announced from the AfriNIC address blocks: 19323 AfriNIC Region origin ASes present in the Internet Routing Table: 2028 AfriNIC Prefixes per ASN: 27.13 AfriNIC Region origin ASes announcing only one prefix: 737 AfriNIC Region transit ASes present in the Internet Routing Table: 394 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: 1395 Number of AfriNIC addresses announced to Internet: 104320512 Equivalent to 6 /8s, 55 /16s and 206 /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 13907 8761 121 CHINAMOBILE-CN China Mobile Communication 7545 5879 825 479 TPG-INTERNET-AP TPG Telecom Limited, AU 9498 4938 552 329 BBIL-AP BHARTI Airtel Ltd., IN 18403 4524 347 24 FPT-AS-AP FPT Telecom Company, VN 7552 4064 1331 26 VIETEL-AS-AP Viettel Group, VN 7713 3694 1044 64 TELKOMNET-AS-AP PT Telekomunikasi Indones 56046 3542 887 177 CMNET-JIANGSU-AP China Mobile communicati 17561 3457 217 604 LCS-AS-AP LARUS Limited, HK 45899 3371 1868 98 VNPT-AS-VN VNPT Corp, VN 24560 2737 744 736 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 15013 41329 5709 AMAZON-02 - Amazon.com, Inc., US 22773 4761 3114 362 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4591 305 1089 CABLEONE - CABLE ONE, INC., US 7155 3870 286 90 VIASAT-SP-BACKBONE - ViaSat,Inc., US 6327 3717 1305 75 SHAW - Shaw Communications, CA 396982 3348 4865 507 GOOGLE-CLOUD-PLATFORM - Google LLC, US 749 3137 54728 2388 DNIC-AS-00749 - United States Department 36352 2915 222 914 AS-COLOCROSSING - HostPapa, US 7029 2634 2558 886 WINDSTREAM - Windstream Communications LL 30036 2577 357 534 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 7136 1711 149 UNI2-AS, ES 39891 4975 307 72 ALJAWWALSTC-AS, SA 9009 3941 363 2349 M247, RO 20940 3914 3389 110 AKAMAI-ASN1, NL 12389 3141 2321 871 ROSTELECOM-AS PJSC Rostelecom. Technical 212238 2795 206 2063 CDNEXT, GB 34984 2491 367 584 TELLCOM-AS, TR 8452 1712 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 12747 3254 632 UNINET, MX 10620 3434 450 1103 Telmex Colombia S.A., CO 13999 2362 501 356 Mega Cable, S.A. de C.V., MX 11830 1936 369 65 Instituto Costarricense de Electricidad y 11664 1470 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 1223 371 22 INTEGRATEL PERU S.A.A., PE 22884 1075 70 362 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1075 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 1292 523 45 Vodafone-, EG 24863 1266 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 37069 1116 1100 11 MOBINIL, EG 29571 1086 70 18 ORANGE-COTE-IVOIRE, CI 20011 643 173 262 NTT-DATA-Inc, ZA 328608 636 57 172 Africa-on-Cloud-AS, ZA 36914 554 82 3 KENET-AS, 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 15013 41329 5709 AMAZON-02 - Amazon.com, Inc., US 9808 13907 8761 121 CHINAMOBILE-CN China Mobile Communication 8151 12747 3254 632 UNINET, MX 12479 7136 1711 149 UNI2-AS, ES 7545 5879 825 479 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4975 307 72 ALJAWWALSTC-AS, SA 9498 4938 552 329 BBIL-AP BHARTI Airtel Ltd., IN 22773 4761 3114 362 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4591 305 1089 CABLEONE - CABLE ONE, INC., US 18403 4524 347 24 FPT-AS-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 13907 13786 CHINAMOBILE-CN China Mobile Communications Grou 8151 12747 12115 UNINET, MX 12479 7136 6987 UNI2-AS, ES 7545 5879 5400 TPG-INTERNET-AP TPG Telecom Limited, AU 39891 4975 4903 ALJAWWALSTC-AS, SA 9498 4938 4609 BBIL-AP BHARTI Airtel Ltd., IN 18403 4524 4500 FPT-AS-AP FPT Telecom Company, VN 22773 4761 4399 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 /12:297 /13:583 /14:1190 /15:2114 /16:13599 /17:8290 /18:13362 /19:25487 /20:45808 /21:52405 /22:113469 /23:108576 /24:662342 /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 6969 12747 UNINET, MX 12479 6072 7136 UNI2-AS, ES 39891 3660 4975 ALJAWWALSTC-AS, SA 6327 3498 3717 SHAW - Shaw Communications, CA 11492 3468 4591 CABLEONE - CABLE ONE, INC., US 22773 3064 4761 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US 7155 2825 3870 VIASAT-SP-BACKBONE - ViaSat,Inc., US 16509 2714 15013 AMAZON-02 - Amazon.com, Inc., US 10620 2238 3434 Telmex Colombia S.A., CO 30036 2232 2577 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) ---------------------------------------------- 1:2492 2:2075 3:1001 4:5 5:5116 6:201 7:6 8:1472 9:59 11:172 12:1141 13:721 14:2718 15:467 16:215 17:443 18:918 20:609 21:4 22:188 23:8364 24:2774 25:2 27:2823 28:1 29:19 31:3552 32:36 34:88 35:284 36:4777 37:4446 38:9680 39:1297 40:412 41:4570 42:2187 43:3164 44:453 45:19761 46:4898 47:413 48:151 49:2246 50:2010 51:768 52:1332 54:289 55:1107 56:11 57:325 58:2345 59:1381 60:1175 61:3172 62:3136 63:1686 64:6377 65:2147 66:6126 67:3276 68:1514 69:4220 70:1056 71:617 72:3180 74:3063 75:1500 76:598 77:2944 78:2042 79:1788 80:2340 81:2255 82:4167 83:1461 84:2163 85:3855 86:1097 87:2583 88:1321 89:4777 90:796 91:8476 92:2789 93:3031 94:4406 95:4703 96:1446 97:307 98:949 99:836 100:70 101:1465 102:4615 103:32509 104:5372 105:851 106:897 107:2943 108:1276 109:4280 110:2282 111:4123 112:3164 113:1977 114:2388 115:2338 116:2076 117:3488 118:3044 119:2078 120:2740 121:1557 122:3024 123:2305 124:1657 125:2986 126:158 128:1600 129:975 130:1686 131:2440 132:882 133:486 134:1722 135:615 136:1464 137:1565 138:3415 139:1709 140:1842 141:1755 142:2556 143:2040 144:1788 145:635 146:2190 147:2256 148:2762 149:3161 150:1379 151:2921 152:2355 153:1698 154:9578 155:2273 156:5160 157:2444 158:1579 159:2869 160:3840 161:1986 162:4099 163:2593 164:2427 165:2678 166:1265 167:2320 168:4052 169:871 170:5621 171:1136 172:4813 173:3452 174:885 175:1356 176:3955 177:5063 178:4409 179:2415 180:3066 181:4578 182:4047 183:2841 184:2021 185:21886 186:6198 187:5078 188:4510 189:4560 190:9888 191:2000 192:11533 193:9622 194:7875 195:5834 196:3436 197:3247 198:6290 199:6056 200:8292 201:6430 202:10701 203:10679 204:4805 205:3741 206:4437 207:3997 208:4371 209:5502 210:4757 211:2691 212:5088 213:4120 214:1040 215:47 216:7312 217:3615 218:1755 219:413 220:2221 221:1321 222:936 223:3442 End of report