IPv4 R&E Routing Table Report 22:10 GMT Sat 16 Aug, 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: 26950 Prefixes after maximum aggregation (per Origin AS): 13347 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 15318 Number of IPv4 prefixes with a valid ROA: 16059 Number of IPv4 prefixes with an invalid ROA: 173 Number of IPv4 prefixes with no ROA: 10718 Total ASes present in the Internet Routing Table: 2831 Prefixes per ASN: 9.52 Origin-only ASes present in the Internet Routing Table: 2455 Origin ASes announcing only one prefix: 1097 Transit ASes present in the Internet Routing Table: 376 Transit-only ASes present in the Internet Routing Table: 66 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: 47181 Number of 32-bit ASNs visible in the Routing Table: 733 Prefixes from 32-bit ASNs in the Routing Table: 5306 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: 11 Number of addresses announced to Internet: 242766815 Equivalent to 14 /8s, 120 /16s and 83 /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: 3834 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4886 Total APNIC prefixes after maximum aggregation: 2367 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4974 Unique aggregates announced from the APNIC address blocks: 2797 APNIC Region origin ASes present in the Internet Routing Table: 604 APNIC Prefixes per ASN: 8.24 APNIC Region origin ASes announcing only one prefix: 252 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 6.0 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 248 Number of APNIC addresses announced to Internet: 45350466 Equivalent to 2 /8s, 179 /16s and 254 /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: 15726 Total ARIN prefixes after maximum aggregation: 7280 ARIN Deaggregation factor: 2.16 Prefixes being announced from the ARIN address blocks: 15398 Unique aggregates announced from the ARIN address blocks: 8243 ARIN Region origin ASes present in the Internet Routing Table: 1300 ARIN Prefixes per ASN: 11.84 ARIN Region origin ASes announcing only one prefix: 462 ARIN Region transit ASes present in the Internet Routing Table: 160 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: 232 Number of ARIN addresses announced to Internet: 132717889 Equivalent to 7 /8s, 233 /16s and 29 /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: 3672 Total RIPE prefixes after maximum aggregation: 2929 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3922 Unique aggregates announced from the RIPE address blocks: 3281 RIPE Region origin ASes present in the Internet Routing Table: 672 RIPE Prefixes per ASN: 5.84 RIPE Region origin ASes announcing only one prefix: 301 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: 161 Number of RIPE addresses announced to Internet: 58195728 Equivalent to 3 /8s, 119 /16s and 255 /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: 1465 Total LACNIC prefixes after maximum aggregation: 594 LACNIC Deaggregation factor: 2.47 Prefixes being announced from the LACNIC address blocks: 1475 Unique aggregates announced from the LACNIC address blocks: 753 LACNIC Region origin ASes present in the Internet Routing Table: 135 LACNIC Prefixes per ASN: 10.93 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: 59 Number of LACNIC addresses announced to Internet: 4085324 Equivalent to 0 /8s, 62 /16s and 86 /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: 1168 Total AfriNIC prefixes after maximum aggregation: 172 AfriNIC Deaggregation factor: 6.79 Prefixes being announced from the AfriNIC address blocks: 1170 Unique aggregates announced from the AfriNIC address blocks: 233 AfriNIC Region origin ASes present in the Internet Routing Table: 52 AfriNIC Prefixes per ASN: 22.50 AfriNIC Region origin ASes announcing only one prefix: 31 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: 16 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 33 Number of AfriNIC addresses announced to Internet: 2412544 Equivalent to 0 /8s, 36 /16s and 208 /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 608 2137 469 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 194 74 146 KREONET-AS-KR KISTI, KR 4538 186 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 149 19 21 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 3215 3858 436 GOOGLE-CLOUD-PLATFORM, US 16509 2497 1924 1183 AMAZON-02, US 14618 1111 4476 857 AMAZON-AES, US 15169 788 183 41 GOOGLE, US 376 200 162 150 RISQ-AS, CA 5786 196 16 1 UPRENET, PR 2920 178 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 139 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 680 286 1883 252 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 109 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 326 177 42 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 112 0 89 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 565 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 3215 3858 436 GOOGLE-CLOUD-PLATFORM, US 16509 2497 1924 1183 AMAZON-02, US 14618 1111 4476 857 AMAZON-AES, US 15169 788 183 41 GOOGLE, US 2907 608 2137 469 SINET-AS Research Organization of Informa 36914 565 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 326 177 42 Rede Nacional de Ensino e Pesquisa, BR 680 286 1883 252 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 2497 1314 AMAZON-02, US 15169 788 747 GOOGLE, US 36914 565 562 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 1916 326 284 Rede Nacional de Ensino e Pesquisa, BR 14618 1111 254 AMAZON-AES, US 5786 196 195 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 23.143.236.0/24 Origin: 401925 GRAPE-AWS-1, US 23.143.236.0/24 Transit: 14618 AMAZON-AES, US 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 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 /12:20 /13:37 /14:85 /15:161 /16:2092 /17:533 /18:540 /19:794 /20:2827 /21:1091 /22:1634 /23:1817 /24:14933 /25:69 /26:86 /27:52 /28:21 /29:68 /30:37 /31:42 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 541 565 KENET-AS, KE 16509 401 2497 AMAZON-02, US 14618 350 1111 AMAZON-AES, US 396982 289 3215 GOOGLE-CLOUD-PLATFORM, US 15169 272 788 GOOGLE, US 8895 106 109 ISU Internet Services Unit ISU, SA 27947 90 112 Telconet S.A, EC 1916 86 326 Rede Nacional de Ensino e Pesquisa, BR 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 3:121 5:25 8:28 12:2 13:60 14:93 15:78 16:119 18:87 23:117 24:3 31:5 34:24 35:73 36:1 37:14 38:11 40:5 41:227 42:18 43:2 44:6 45:71 46:10 47:1 49:12 50:12 52:548 54:163 57:7 58:14 59:20 60:6 61:3 62:9 63:36 64:158 65:23 66:99 67:68 68:20 69:50 70:28 71:2 72:19 74:153 75:1 76:32 77:11 78:3 79:12 80:15 81:27 82:7 83:8 84:7 85:55 86:6 87:5 88:1 89:20 91:54 92:7 93:47 94:3 95:2 96:8 97:1 98:11 99:48 101:3 102:15 103:393 104:251 107:38 108:111 109:12 110:1 111:21 113:2 114:29 116:10 117:63 118:34 119:31 121:29 122:8 123:8 124:42 125:5 128:59 129:49 130:135 131:72 132:68 133:156 134:118 135:4 136:303 137:68 138:14 139:17 140:44 141:11 142:327 143:25 144:49 145:5 146:147 147:68 148:208 149:15 150:37 151:41 152:147 153:15 154:40 155:111 156:137 157:38 158:35 159:178 160:35 161:29 162:94 163:83 164:21 165:65 166:2 167:38 168:152 169:12 170:90 171:1 172:126 173:117 174:2 175:16 176:3 177:5 178:1 179:10 180:16 181:1 182:12 184:7 185:115 186:4 187:19 188:21 190:2 191:13 192:1593 193:315 194:131 195:84 196:148 197:347 198:497 199:335 200:301 201:21 202:638 203:441 204:401 205:158 206:234 207:257 208:154 209:177 210:222 211:3 212:152 213:16 216:209 217:25 218:23 219:7 220:16 222:4 223:16 End of report