IPv4 R&E Routing Table Report 22:10 GMT Thu 04 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: 26792 Prefixes after maximum aggregation (per Origin AS): 13260 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 15232 Number of IPv4 prefixes with a valid ROA: 16053 Number of IPv4 prefixes with an invalid ROA: 173 Number of IPv4 prefixes with no ROA: 10566 Total ASes present in the Internet Routing Table: 2827 Prefixes per ASN: 9.48 Origin-only ASes present in the Internet Routing Table: 2455 Origin ASes announcing only one prefix: 1098 Transit ASes present in the Internet Routing Table: 372 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: 47315 Number of 32-bit ASNs visible in the Routing Table: 736 Prefixes from 32-bit ASNs in the Routing Table: 5317 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: 242613537 Equivalent to 14 /8s, 117 /16s and 253 /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: 4876 Total APNIC prefixes after maximum aggregation: 2379 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4967 Unique aggregates announced from the APNIC address blocks: 2788 APNIC Region origin ASes present in the Internet Routing Table: 611 APNIC Prefixes per ASN: 8.13 APNIC Region origin ASes announcing only one prefix: 254 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: 251 Number of APNIC addresses announced to Internet: 45542976 Equivalent to 2 /8s, 182 /16s and 238 /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: 15609 Total ARIN prefixes after maximum aggregation: 7181 ARIN Deaggregation factor: 2.17 Prefixes being announced from the ARIN address blocks: 15274 Unique aggregates announced from the ARIN address blocks: 8160 ARIN Region origin ASes present in the Internet Routing Table: 1293 ARIN Prefixes per ASN: 11.81 ARIN Region origin ASes announcing only one prefix: 465 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: 132251201 Equivalent to 7 /8s, 225 /16s and 254 /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: 2927 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3926 Unique aggregates announced from the RIPE address blocks: 3284 RIPE Region origin ASes present in the Internet Routing Table: 670 RIPE Prefixes per ASN: 5.86 RIPE Region origin ASes announcing only one prefix: 301 RIPE Region transit ASes present in the Internet Routing Table: 106 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: 58233104 Equivalent to 3 /8s, 120 /16s and 145 /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: 1423 Total LACNIC prefixes after maximum aggregation: 592 LACNIC Deaggregation factor: 2.40 Prefixes being announced from the LACNIC address blocks: 1433 Unique aggregates announced from the LACNIC address blocks: 753 LACNIC Region origin ASes present in the Internet Routing Table: 134 LACNIC Prefixes per ASN: 10.69 LACNIC Region origin ASes announcing only one prefix: 50 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: 58 Number of LACNIC addresses announced to Internet: 4085136 Equivalent to 0 /8s, 62 /16s and 85 /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: 1180 Total AfriNIC prefixes after maximum aggregation: 176 AfriNIC Deaggregation factor: 6.70 Prefixes being announced from the AfriNIC address blocks: 1182 Unique aggregates announced from the AfriNIC address blocks: 237 AfriNIC Region origin ASes present in the Internet Routing Table: 53 AfriNIC Prefixes per ASN: 22.30 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 9 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: 32 Number of AfriNIC addresses announced to Internet: 2496512 Equivalent to 0 /8s, 38 /16s and 24 /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 2169 462 SINET-AS Research Organization of Informa 7497 450 180 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 170 281 114 AARNET-AS-AP Australian Academic and Rese 55824 149 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 3222 3859 440 GOOGLE-CLOUD-PLATFORM, US 16509 2433 1920 1122 AMAZON-02, US 14618 1133 4734 872 AMAZON-AES, US 15169 795 183 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 121 26 53 Red Universitaria Nacional, CL 27947 111 0 88 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 37654 10 1 6 RwEdNet-AS, RW 327700 10 16 1 MoRENet, MZ 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 3222 3859 440 GOOGLE-CLOUD-PLATFORM, US 16509 2433 1920 1122 AMAZON-02, US 14618 1133 4734 872 AMAZON-AES, US 15169 795 183 41 GOOGLE, US 2907 609 2169 462 SINET-AS Research Organization of Informa 36914 571 82 3 KENET-AS, KE 7497 450 180 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 2433 1311 AMAZON-02, US 15169 795 754 GOOGLE, US 36914 571 568 KENET-AS, KE 7497 450 427 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1133 261 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 /16:2081 /17:534 /18:532 /19:793 /20:2809 /21:1055 /22:1625 /23:1786 /24:14889 /25:70 /26:87 /27:52 /28:21 /29:67 /30:36 /31:42 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 547 571 KENET-AS, KE 16509 374 2433 AMAZON-02, US 14618 351 1133 AMAZON-AES, US 396982 289 3222 GOOGLE-CLOUD-PLATFORM, US 15169 272 795 GOOGLE, US 8895 105 108 ISU Internet Services Unit ISU, SA 27947 90 111 Telconet S.A, EC 1916 88 293 Rede Nacional de Ensino e Pesquisa, BR 3267 36 81 NIKS, RU 200521 34 59 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 41:228 42:18 43:2 44:6 45:65 46:10 47:1 49:12 50:12 52:548 54:168 57:5 58:14 59:20 60:5 61:3 62:9 63:36 64:154 65:22 66:99 67:68 68:20 69:50 70:27 71:2 72:19 74:155 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 99:48 101:3 102:14 103:392 104:252 107:38 108:100 109:12 110:1 111:11 113:2 114:29 116:10 117:63 118:34 119:31 121:24 122:8 123:8 124:42 125:5 128:59 129:50 130:132 131:72 132:66 133:156 134:119 135:4 136:305 137:67 138:14 139:17 140:45 141:11 142:327 143:29 144:54 145:3 146:147 147:43 148:209 149:16 150:37 151:45 152:147 153:37 154:40 155:114 156:132 157:38 158:35 159:177 160:35 161:45 162:96 163:83 164:21 165:66 166:2 167:39 168:158 169:12 170:88 171:1 172:132 173:117 174:2 175:16 176:3 177:4 178:1 179:10 180:16 181:1 182:12 184:3 185:114 186:4 187:19 188:21 190:2 191:13 192:1575 193:312 194:130 195:84 196:149 197:355 198:491 199:337 200:296 201:21 202:641 203:443 204:399 205:156 206:231 207:257 208:153 209:178 210:222 211:3 212:152 213:16 216:209 217:26 218:23 219:7 220:16 222:4 223:16 End of report