IPv4 R&E Routing Table Report 22:10 GMT Wed 29 Oct, 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: 22592 Prefixes after maximum aggregation (per Origin AS): 12643 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 14486 Number of IPv4 prefixes with a valid ROA: 11996 Number of IPv4 prefixes with an invalid ROA: 162 Number of IPv4 prefixes with no ROA: 10434 Total ASes present in the Internet Routing Table: 2797 Prefixes per ASN: 8.08 Origin-only ASes present in the Internet Routing Table: 2425 Origin ASes announcing only one prefix: 1093 Transit ASes present in the Internet Routing Table: 372 Transit-only ASes present in the Internet Routing Table: 62 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: 16 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 11 Number of instances of unregistered ASNs: 11 Number of 32-bit ASNs allocated by the RIRs: 47827 Number of 32-bit ASNs visible in the Routing Table: 726 Prefixes from 32-bit ASNs in the Routing Table: 1949 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: 222445623 Equivalent to 13 /8s, 66 /16s and 64 /24s Percentage of available address space announced: 6.0 Percentage of allocated address space announced: 6.0 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: 3207 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4786 Total APNIC prefixes after maximum aggregation: 2348 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4811 Unique aggregates announced from the APNIC address blocks: 2649 APNIC Region origin ASes present in the Internet Routing Table: 603 APNIC Prefixes per ASN: 7.98 APNIC Region origin ASes announcing only one prefix: 252 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 247 Number of APNIC addresses announced to Internet: 44687424 Equivalent to 2 /8s, 169 /16s and 224 /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: 11478 Total ARIN prefixes after maximum aggregation: 6599 ARIN Deaggregation factor: 1.74 Prefixes being announced from the ARIN address blocks: 11294 Unique aggregates announced from the ARIN address blocks: 7596 ARIN Region origin ASes present in the Internet Routing Table: 1275 ARIN Prefixes per ASN: 8.86 ARIN Region origin ASes announcing only one prefix: 460 ARIN Region transit ASes present in the Internet Routing Table: 156 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 225 Number of ARIN addresses announced to Internet: 113067297 Equivalent to 6 /8s, 189 /16s and 69 /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: 3658 Total RIPE prefixes after maximum aggregation: 2899 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3810 Unique aggregates announced from the RIPE address blocks: 3183 RIPE Region origin ASes present in the Internet Routing Table: 665 RIPE Prefixes per ASN: 5.73 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: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 163 Number of RIPE addresses announced to Internet: 58161680 Equivalent to 3 /8s, 119 /16s and 122 /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: 1406 Total LACNIC prefixes after maximum aggregation: 579 LACNIC Deaggregation factor: 2.43 Prefixes being announced from the LACNIC address blocks: 1413 Unique aggregates announced from the LACNIC address blocks: 738 LACNIC Region origin ASes present in the Internet Routing Table: 132 LACNIC Prefixes per ASN: 10.70 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: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 56 Number of LACNIC addresses announced to Internet: 4007878 Equivalent to 0 /8s, 61 /16s and 39 /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: 1253 Total AfriNIC prefixes after maximum aggregation: 215 AfriNIC Deaggregation factor: 5.83 Prefixes being announced from the AfriNIC address blocks: 1254 Unique aggregates announced from the AfriNIC address blocks: 310 AfriNIC Region origin ASes present in the Internet Routing Table: 57 AfriNIC Prefixes per ASN: 22.00 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 11 Average AfriNIC Region AS path length visible: 3.9 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 35 Number of AfriNIC addresses announced to Internet: 2516992 Equivalent to 0 /8s, 38 /16s and 104 /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 611 2169 463 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 198 72 153 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 167 281 113 AARNET-AS-AP Australian Academic and Rese 55824 152 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 4621 62 36 8 UNINET-AS-AP UNINET-, TH 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 16509 2577 1937 1205 AMAZON-02, US 14618 1162 4746 898 AMAZON-AES, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 176 34 7 LACOE, US 2152 149 492 98 CENIC-2152, US 18558 137 18 4 NETBLK-RCOEK, US 81 118 471 35 NCREN, US 21976 90 34 16 NJEDGE-NET, US 237 83 542 49 MERIT-AS-14, 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 786 213 1739 190 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 106 24 5 ISU Internet Services Unit ISU, SA 1103 100 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 88 26 68 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 3267 81 29 70 NIKS, RU 1930 77 88 72 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 290 177 42 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 106 0 84 Telconet S.A, EC 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 56 84 39 Fundacao Carlos Chagas Filho de Amparo a 19611 50 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 566 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 2561 68 4 34 EUN, EG 8094 47 48 18 PUKNET, ZA 37215 43 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 327700 12 16 1 MoRENet, MZ 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 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 16509 2577 1937 1205 AMAZON-02, US 14618 1162 4746 898 AMAZON-AES, US 2907 611 2169 463 SINET-AS Research Organization of Informa 36914 566 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 290 177 42 Rede Nacional de Ensino e Pesquisa, BR 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 213 1739 190 JANET Jisc Services Limited, GB 376 200 162 150 RISQ-AS, CA Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 566 563 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1162 264 AMAZON-AES, US 1916 290 248 Rede Nacional de Ensino e Pesquisa, BR 5786 198 197 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 176 169 LACOE, US 2907 611 148 SINET-AS Research Organization of Information a 18558 137 133 NETBLK-RCOEK, 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 64011 UNALLOCATED 130.215.0.0/16 10326 WPI, US 396334 UNALLOCATED 205.143.136.0/21 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.136.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.137.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.138.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.139.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.140.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.141.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.142.0/24 5078 ONENET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 165.101.120.0/24 Origin: 150725 NUS-AS-AP National University of Singapo 165.101.120.0/24 Transit: 23855 SINGAREN-GIX-AS-AP Singapore Advanced Re 192.225.212.0/24 Origin: 14618 AMAZON-AES, US 192.225.212.0/24 Transit: 16509 AMAZON-02, US 192.225.223.0/24 Origin: 14618 AMAZON-AES, US 192.225.223.0/24 Transit: 16509 AMAZON-02, US 198.135.168.0/24 Origin: 14618 AMAZON-AES, US 198.135.168.0/24 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 /11:2 /12:16 /13:27 /14:48 /15:151 /16:1960 /17:434 /18:489 /19:648 /20:952 /21:986 /22:1572 /23:1695 /24:13248 /25:68 /26:84 /27:49 /28:22 /29:55 /30:38 /31:41 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 542 566 KENET-AS, KE 16509 400 2577 AMAZON-02, US 14618 359 1162 AMAZON-AES, US 8895 103 106 ISU Internet Services Unit ISU, SA 1916 85 290 Rede Nacional de Ensino e Pesquisa, BR 27947 83 106 Telconet S.A, EC 31638 48 48 ASN-LEPIDA, IT 37215 37 43 MAREN, MW 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) ---------------------------------------------- 1:7 3:133 5:23 8:2 12:2 13:61 14:95 15:81 16:119 18:88 23:41 24:5 31:4 35:35 37:26 38:11 40:5 41:227 42:18 44:6 45:60 46:6 47:1 49:13 50:7 52:548 54:170 58:14 59:20 60:6 61:3 62:8 63:34 64:113 65:22 66:89 67:62 68:20 69:45 70:9 71:2 72:18 74:83 75:1 76:32 77:12 78:3 79:9 80:12 81:27 82:7 83:6 84:6 85:52 86:7 87:1 88:1 89:23 91:47 92:4 93:46 94:3 95:2 96:8 97:1 98:10 99:53 101:3 102:17 103:369 104:112 107:7 108:24 109:10 110:1 111:7 113:1 114:22 116:11 117:7 118:34 119:30 121:13 122:8 123:8 124:42 125:5 128:57 129:46 130:125 131:66 132:65 133:158 134:118 135:3 136:218 137:73 138:13 139:17 140:42 141:10 142:48 143:27 144:73 145:14 146:147 147:38 148:213 149:18 150:37 151:28 152:133 153:36 154:40 155:112 156:128 157:39 158:34 159:181 160:34 161:42 162:60 163:86 164:20 165:62 166:2 167:26 168:143 169:12 170:85 171:1 172:9 173:27 174:2 175:8 176:2 177:5 178:1 179:9 180:16 181:1 182:11 184:3 185:72 186:4 187:19 188:25 190:2 191:13 192:1466 193:350 194:128 195:99 196:150 197:354 198:497 199:302 200:295 201:20 202:623 203:447 204:396 205:151 206:231 207:256 208:99 209:117 210:225 211:3 212:149 213:16 216:180 217:25 218:20 219:7 220:16 222:4 223:17 End of report