IPv4 R&E Routing Table Report 22:10 GMT Thu 27 Nov, 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: 22209 Prefixes after maximum aggregation (per Origin AS): 12522 Deaggregation factor: 1.77 Unique aggregates announced (without unneeded subnets): 14280 Number of IPv4 prefixes with a valid ROA: 11895 Number of IPv4 prefixes with an invalid ROA: 40 Number of IPv4 prefixes with no ROA: 10274 Total ASes present in the Internet Routing Table: 2792 Prefixes per ASN: 7.95 Origin-only ASes present in the Internet Routing Table: 2419 Origin ASes announcing only one prefix: 1087 Transit ASes present in the Internet Routing Table: 373 Transit-only ASes present in the Internet Routing Table: 63 Paths with bogon ASNs present in the IPv4 Routing Table: 1 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 29 Max AS path prepend of ASN (200323) 20 Prefixes from unregistered ASNs in the Routing Table: 12 Number of instances of unregistered ASNs: 12 Number of 32-bit ASNs allocated by the RIRs: 48070 Number of 32-bit ASNs visible in the Routing Table: 732 Prefixes from 32-bit ASNs in the Routing Table: 1977 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: 8 Number of addresses announced to Internet: 222897413 Equivalent to 13 /8s, 73 /16s and 37 /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: 3122 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4746 Total APNIC prefixes after maximum aggregation: 2324 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4773 Unique aggregates announced from the APNIC address blocks: 2604 APNIC Region origin ASes present in the Internet Routing Table: 602 APNIC Prefixes per ASN: 7.93 APNIC Region origin ASes announcing only one prefix: 251 APNIC Region transit ASes present in the Internet Routing Table: 54 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: 251 Number of APNIC addresses announced to Internet: 45393728 Equivalent to 2 /8s, 180 /16s and 167 /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: 11473 Total ARIN prefixes after maximum aggregation: 6670 ARIN Deaggregation factor: 1.72 Prefixes being announced from the ARIN address blocks: 11290 Unique aggregates announced from the ARIN address blocks: 7697 ARIN Region origin ASes present in the Internet Routing Table: 1279 ARIN Prefixes per ASN: 8.83 ARIN Region origin ASes announcing only one prefix: 460 ARIN Region transit ASes present in the Internet Routing Table: 155 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: 228 Number of ARIN addresses announced to Internet: 113118816 Equivalent to 6 /8s, 190 /16s and 14 /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: 3651 Total RIPE prefixes after maximum aggregation: 2905 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3802 Unique aggregates announced from the RIPE address blocks: 3178 RIPE Region origin ASes present in the Internet Routing Table: 666 RIPE Prefixes per ASN: 5.71 RIPE Region origin ASes announcing only one prefix: 299 RIPE Region transit ASes present in the Internet Routing Table: 111 Average RIPE Region AS path length visible: 4.9 Max RIPE Region AS path length visible: 29 Number of RIPE region 32-bit ASNs visible in the Routing Table: 166 Number of RIPE addresses announced to Internet: 58133265 Equivalent to 3 /8s, 119 /16s and 11 /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: 1075 Total LACNIC prefixes after maximum aggregation: 406 LACNIC Deaggregation factor: 2.65 Prefixes being announced from the LACNIC address blocks: 1083 Unique aggregates announced from the LACNIC address blocks: 485 LACNIC Region origin ASes present in the Internet Routing Table: 122 LACNIC Prefixes per ASN: 8.88 LACNIC Region origin ASes announcing only one prefix: 49 LACNIC Region transit ASes present in the Internet Routing Table: 21 Average LACNIC Region AS path length visible: 4.0 Max LACNIC Region AS path length visible: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 53 Number of LACNIC addresses announced to Internet: 3739988 Equivalent to 0 /8s, 57 /16s and 17 /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: 1252 Total AfriNIC prefixes after maximum aggregation: 213 AfriNIC Deaggregation factor: 5.88 Prefixes being announced from the AfriNIC address blocks: 1253 Unique aggregates announced from the AfriNIC address blocks: 308 AfriNIC Region origin ASes present in the Internet Routing Table: 56 AfriNIC Prefixes per ASN: 22.38 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 12 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: 34 Number of AfriNIC addresses announced to Internet: 2507776 Equivalent to 0 /8s, 38 /16s and 68 /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 602 2169 463 SINET-AS Research Organization of Informa 7497 453 180 23 CSTNET-AS-AP Computer Network Information 1237 199 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 165 281 112 AARNET-AS-AP Australian Academic and Rese 55824 151 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 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 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 2493 1985 1226 AMAZON-02, US 14618 1170 4745 903 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 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 8895 103 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 291 177 44 Rede Nacional de Ensino e Pesquisa, BR 11340 121 26 53 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 57 84 39 Fundacao Carlos Chagas Filho de Amparo a 19611 53 17 2 Associacao Antonio Vieira - Unisinos, BR 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 20191 26 16 1 Pontificia Universidad Catolica de Chile, 21612 25 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 61468 24 0 18 CEDIA, EC 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 2561 68 4 34 EUN, EG 8094 47 48 18 PUKNET, ZA 37215 44 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 2493 1985 1226 AMAZON-02, US 14618 1170 4745 903 AMAZON-AES, US 2907 602 2169 463 SINET-AS Research Organization of Informa 36914 565 82 3 KENET-AS, KE 7497 453 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 291 177 44 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 565 562 KENET-AS, KE 7497 453 430 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1170 267 AMAZON-AES, US 1916 291 247 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 602 139 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 64510 DOCUMENT 185.48.234.168/32 200999 PL-CLOUDFERRO, PL 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 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 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 202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP Adelaide Unive 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res 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 /12:17 /13:27 /14:48 /15:151 /16:1955 /17:427 /18:491 /19:647 /20:967 /21:993 /22:1574 /23:1703 /24:12967 /25:64 /26:84 /27:48 /28:11 /29:13 /30:9 /31:4 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 541 565 KENET-AS, KE 16509 405 2493 AMAZON-02, US 14618 359 1170 AMAZON-AES, US 8895 100 103 ISU Internet Services Unit ISU, SA 1916 86 291 Rede Nacional de Ensino e Pesquisa, BR 31638 48 48 ASN-LEPIDA, IT 37215 38 44 MAREN, MW 3267 36 81 NIKS, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 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 13:58 14:95 15:81 16:119 18:88 23:46 24:5 31:4 35:35 37:26 38:12 40:5 41:227 42:18 44:6 45:59 46:6 47:1 49:13 50:8 52:500 54:106 58:14 59:20 60:6 61:3 62:8 63:34 64:116 65:23 66:89 67:61 68:20 69:45 70:8 71:2 72:20 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 96:9 97:1 98:10 99:51 101:3 102:17 103:369 104:116 107:8 108:24 109:10 110:1 111:7 113:1 114:22 116:11 117:7 118:33 119:30 121:17 122:8 123:8 124:42 125:5 128:57 129:48 130:124 131:71 132:60 133:158 134:117 135:3 136:218 137:73 138:15 139:16 140:41 141:10 142:50 143:27 144:54 145:14 146:147 147:75 148:22 149:18 150:37 151:28 152:133 153:42 154:40 155:112 156:128 157:40 158:37 159:181 160:34 161:42 162:60 163:77 164:20 165:62 166:2 167:27 168:144 169:12 170:84 171:1 172:9 173:27 174:2 175:15 176:2 177:5 178:1 179:9 180:16 181:1 182:11 184:6 185:72 186:4 187:18 188:24 190:2 191:13 192:1463 193:346 194:128 195:98 196:150 197:353 198:500 199:304 200:295 201:19 202:591 203:446 204:406 205:154 206:229 207:257 208:99 209:124 210:225 211:3 212:144 213:16 216:183 217:24 218:20 219:7 220:16 222:4 223:17 End of report