IPv4 R&E Routing Table Report 22:10 GMT Sat 06 Sep, 2025 IPv4 BGP Table (R&E) as seen at CEDIA. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/CEDIA/ Analysis Summary ---------------- BGP routing table entries examined: 26800 Prefixes after maximum aggregation (per Origin AS): 13263 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 15238 Number of IPv4 prefixes with a valid ROA: 16072 Number of IPv4 prefixes with an invalid ROA: 169 Number of IPv4 prefixes with no ROA: 10559 Total ASes present in the Internet Routing Table: 2826 Prefixes per ASN: 9.48 Origin-only ASes present in the Internet Routing Table: 2452 Origin ASes announcing only one prefix: 1101 Transit ASes present in the Internet Routing Table: 374 Transit-only ASes present in the Internet Routing Table: 64 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.8 Max AS path length visible: 17 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 47334 Number of 32-bit ASNs visible in the Routing Table: 735 Prefixes from 32-bit ASNs in the Routing Table: 5316 Number of bogon 32-bit ASNs visible in the Routing Table: 0 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 10 Number of addresses announced to Internet: 242548505 Equivalent to 14 /8s, 116 /16s and 255 /24s Percentage of available address space announced: 6.6 Percentage of allocated address space announced: 6.6 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: 3815 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4877 Total APNIC prefixes after maximum aggregation: 2378 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4968 Unique aggregates announced from the APNIC address blocks: 2787 APNIC Region origin ASes present in the Internet Routing Table: 610 APNIC Prefixes per ASN: 8.14 APNIC Region origin ASes announcing only one prefix: 253 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 5.9 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 250 Number of APNIC addresses announced to Internet: 45477184 Equivalent to 2 /8s, 181 /16s and 237 /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: 15623 Total ARIN prefixes after maximum aggregation: 7186 ARIN Deaggregation factor: 2.17 Prefixes being announced from the ARIN address blocks: 15287 Unique aggregates announced from the ARIN address blocks: 8171 ARIN Region origin ASes present in the Internet Routing Table: 1293 ARIN Prefixes per ASN: 11.82 ARIN Region origin ASes announcing only one prefix: 466 ARIN Region transit ASes present in the Internet Routing Table: 157 Average ARIN Region AS path length visible: 4.4 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 233 Number of ARIN addresses announced to Internet: 132255809 Equivalent to 7 /8s, 226 /16s and 16 /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: 3671 Total RIPE prefixes after maximum aggregation: 2931 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3927 Unique aggregates announced from the RIPE address blocks: 3285 RIPE Region origin ASes present in the Internet Routing Table: 671 RIPE Prefixes per ASN: 5.85 RIPE Region origin ASes announcing only one prefix: 302 RIPE Region transit ASes present in the Internet Routing Table: 107 Average RIPE Region AS path length visible: 4.9 Max RIPE Region AS path length visible: 16 Number of RIPE region 32-bit ASNs visible in the Routing Table: 162 Number of RIPE addresses announced to Internet: 58233616 Equivalent to 3 /8s, 120 /16s and 147 /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: 1414 Total LACNIC prefixes after maximum aggregation: 586 LACNIC Deaggregation factor: 2.41 Prefixes being announced from the LACNIC address blocks: 1424 Unique aggregates announced from the LACNIC address blocks: 747 LACNIC Region origin ASes present in the Internet Routing Table: 132 LACNIC Prefixes per ASN: 10.79 LACNIC Region origin ASes announcing only one prefix: 51 LACNIC Region transit ASes present in the Internet Routing Table: 28 Average LACNIC Region AS path length visible: 4.6 Max LACNIC Region AS path length visible: 17 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 57 Number of LACNIC addresses announced to Internet: 4080520 Equivalent to 0 /8s, 62 /16s and 67 /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: 1182 Total AfriNIC prefixes after maximum aggregation: 177 AfriNIC Deaggregation factor: 6.68 Prefixes being announced from the AfriNIC address blocks: 1184 Unique aggregates announced from the AfriNIC address blocks: 238 AfriNIC Region origin ASes present in the Internet Routing Table: 54 AfriNIC Prefixes per ASN: 21.93 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 5.4 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 33 Number of AfriNIC addresses announced to Internet: 2496768 Equivalent to 0 /8s, 38 /16s and 25 /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 2907 609 2153 462 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 196 74 147 KREONET-AS-KR KISTI, KR 4538 184 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 114 AARNET-AS-AP Australian Academic and Rese 55824 150 19 22 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 67 37 9 UNINET-AS-AP UNINET-, TH 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 396982 3224 3859 442 GOOGLE-CLOUD-PLATFORM, US 16509 2438 1921 1123 AMAZON-02, US 14618 1138 4735 875 AMAZON-AES, US 15169 797 183 41 GOOGLE, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 178 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 138 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 190 1742 185 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 3267 81 29 70 NIKS, RU 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 293 177 43 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 120 25 53 Red Universitaria Nacional, CL 27947 109 0 86 Telconet S.A, EC 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 53 100 36 Fundacao Carlos Chagas Filho de Amparo a 19611 49 17 2 Associacao Antonio Vieira - Unisinos, BR 3596 40 8 4 Universidad Autonoma Metropolitana, MX 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 571 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 38 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 396982 3224 3859 442 GOOGLE-CLOUD-PLATFORM, US 16509 2438 1921 1123 AMAZON-02, US 14618 1138 4735 875 AMAZON-AES, US 15169 797 183 41 GOOGLE, US 2907 609 2153 462 SINET-AS Research Organization of Informa 36914 571 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 293 177 43 Rede Nacional de Ensino e Pesquisa, BR 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 16509 2438 1315 AMAZON-02, US 15169 797 756 GOOGLE, US 36914 571 568 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1138 263 AMAZON-AES, US 1916 293 250 Rede Nacional de Ensino e Pesquisa, BR 5786 198 197 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 178 171 LACOE, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 67.158.57.0/24 Origin: 14618 AMAZON-AES, US 67.158.57.0/24 Transit: 16509 AMAZON-02, US 103.177.50.0/23 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US 103.177.50.0/23 Transit: 15169 GOOGLE, US 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 185.131.202.0/24 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US 185.131.202.0/24 Transit: 15169 GOOGLE, US 192.225.212.0/24 Origin: 14618 AMAZON-AES, US 192.225.212.0/24 Transit: 16509 AMAZON-02, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/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 /8:0 /9:1 /10:1 /11:4 /12:21 /13:37 /14:83 /15:161 /16:2080 /17:534 /18:532 /19:793 /20:2807 /21:1053 /22:1625 /23:1793 /24:14897 /25:70 /26:87 /27:53 /28:21 /29:67 /30:35 /31:40 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 547 571 KENET-AS, KE 16509 374 2438 AMAZON-02, US 14618 351 1138 AMAZON-AES, US 396982 290 3224 GOOGLE-CLOUD-PLATFORM, US 15169 273 797 GOOGLE, US 8895 105 108 ISU Internet Services Unit ISU, SA 1916 88 293 Rede Nacional de Ensino e Pesquisa, BR 27947 88 109 Telconet S.A, EC 3267 36 81 NIKS, RU 200521 33 58 SEAP-AGE, ES Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:6 2:1 3:115 5:27 8:28 12:2 13:53 14:93 15:78 16:119 18:78 23:116 24:5 31:5 34:25 35:72 36:1 37:14 38:11 40:5 41:227 42:18 43:2 44:6 45:65 46:10 47:1 49:12 50:12 52:548 54:169 57:5 58:14 59:20 60:6 61:3 62:9 63:36 64:154 65:22 66:99 67:68 68:20 69:50 70:27 71:2 72:19 74:156 75:1 76:32 77:11 78:3 79:12 80:16 81:27 82:7 83:8 84:7 85:55 86:6 87:5 88:1 89:21 91:54 92:7 93:47 94:3 95:2 96:8 97:1 98:11 99:48 101:3 102:15 103:393 104:253 107:38 108:100 109:12 110:1 111:11 113:2 114:29 116:10 117:63 118:34 119:31 121:24 122:8 123:8 124:42 125:5 128:59 129:50 130:131 131:71 132:66 133:156 134:119 135:4 136:305 137:68 138:14 139:17 140:45 141:11 142:327 143:29 144:54 145:3 146:146 147:44 148:209 149:16 150:37 151:45 152:147 153:37 154:40 155:114 156:132 157:38 158:35 159:180 160:35 161:45 162:96 163:83 164:21 165:66 166:2 167:39 168:158 169:12 170:88 171:1 172:132 173:117 174:2 175:16 176:3 177:3 178:1 179:10 180:16 181:1 182:12 184:3 185:114 186:4 187:19 188:21 190:2 191:13 192:1576 193:312 194:130 195:84 196:149 197:357 198:492 199:337 200:296 201:21 202:641 203:443 204:398 205:155 206:231 207:257 208:153 209:178 210:222 211:3 212:151 213:16 216:210 217:26 218:23 219:7 220:16 222:4 223:16 End of report