IPv4 R&E Routing Table Report 22:10 GMT Sat 24 Jan, 2026 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: 22024 Prefixes after maximum aggregation (per Origin AS): 12538 Deaggregation factor: 1.76 Unique aggregates announced (without unneeded subnets): 14370 Number of IPv4 prefixes with a valid ROA: 11535 Number of IPv4 prefixes with an invalid ROA: 170 Number of IPv4 prefixes with no ROA: 10319 Total ASes present in the Internet Routing Table: 2744 Prefixes per ASN: 8.03 Origin-only ASes present in the Internet Routing Table: 2368 Origin ASes announcing only one prefix: 1067 Transit ASes present in the Internet Routing Table: 376 Transit-only ASes present in the Internet Routing Table: 68 Paths with bogon ASNs present in the IPv4 Routing Table: 1 Average AS path length visible in the Internet Routing Table: 4.8 Max AS path length visible: 21 Max AS path prepend of ASN (395156) 12 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: 48484 Number of 32-bit ASNs visible in the Routing Table: 716 Prefixes from 32-bit ASNs in the Routing Table: 2008 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: 5 Number of addresses announced to Internet: 222717724 Equivalent to 13 /8s, 70 /16s and 103 /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: 3145 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4737 Total APNIC prefixes after maximum aggregation: 2321 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4769 Unique aggregates announced from the APNIC address blocks: 2593 APNIC Region origin ASes present in the Internet Routing Table: 599 APNIC Prefixes per ASN: 7.96 APNIC Region origin ASes announcing only one prefix: 257 APNIC Region transit ASes present in the Internet Routing Table: 54 Average APNIC Region AS path length visible: 5.4 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 250 Number of APNIC addresses announced to Internet: 45471808 Equivalent to 2 /8s, 181 /16s and 216 /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: 11176 Total ARIN prefixes after maximum aggregation: 6722 ARIN Deaggregation factor: 1.66 Prefixes being announced from the ARIN address blocks: 10989 Unique aggregates announced from the ARIN address blocks: 7769 ARIN Region origin ASes present in the Internet Routing Table: 1294 ARIN Prefixes per ASN: 8.49 ARIN Region origin ASes announcing only one prefix: 467 ARIN Region transit ASes present in the Internet Routing Table: 160 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 21 Number of ARIN region 32-bit ASNs visible in the Routing Table: 230 Number of ARIN addresses announced to Internet: 113131297 Equivalent to 6 /8s, 190 /16s and 63 /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: 3428 Total RIPE prefixes after maximum aggregation: 2712 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3579 Unique aggregates announced from the RIPE address blocks: 2971 RIPE Region origin ASes present in the Internet Routing Table: 605 RIPE Prefixes per ASN: 5.92 RIPE Region origin ASes announcing only one prefix: 275 RIPE Region transit ASes present in the Internet Routing Table: 105 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 157 Number of RIPE addresses announced to Internet: 57692289 Equivalent to 3 /8s, 112 /16s and 80 /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: 1433 Total LACNIC prefixes after maximum aggregation: 579 LACNIC Deaggregation factor: 2.47 Prefixes being announced from the LACNIC address blocks: 1443 Unique aggregates announced from the LACNIC address blocks: 742 LACNIC Region origin ASes present in the Internet Routing Table: 130 LACNIC Prefixes per ASN: 11.10 LACNIC Region origin ASes announcing only one prefix: 49 LACNIC Region transit ASes present in the Internet Routing Table: 29 Average LACNIC Region AS path length visible: 4.7 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: 3942458 Equivalent to 0 /8s, 60 /16s and 40 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-275868 + 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: 1238 Total AfriNIC prefixes after maximum aggregation: 200 AfriNIC Deaggregation factor: 6.19 Prefixes being announced from the AfriNIC address blocks: 1239 Unique aggregates announced from the AfriNIC address blocks: 290 AfriNIC Region origin ASes present in the Internet Routing Table: 44 AfriNIC Prefixes per ASN: 28.16 AfriNIC Region origin ASes announcing only one prefix: 19 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 3.9 Max AfriNIC Region AS path length visible: 7 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 23 Number of AfriNIC addresses announced to Internet: 2476800 Equivalent to 0 /8s, 37 /16s and 203 /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 454 180 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 164 281 111 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 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 2176 2015 1244 AMAZON-02 - Amazon.com, Inc., US 14618 1210 4749 927 AMAZON-AES - Amazon.com, Inc., US 376 198 162 152 RISQ-AS - Reseau dInformations Scientifiq 5786 197 16 1 UPRENET - University of Puerto Rico, PR 2920 176 34 7 LACOE - Los Angeles County Office of Educ 2152 147 491 96 CENIC-2152 - CENIC, US 18558 140 18 4 NETBLK-RCOEK - Riverside County Office of 81 117 455 35 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 237 83 542 49 MERIT-AS-14 - Merit Network Inc., 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 680 284 1883 251 DFN Verein zur Foerderung eines Deutschen 786 214 1738 187 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 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 64 630 59 FR-RENATER Reseau National de telecommuni 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 28391 161 10 72 Universidad Juarez Autonoma de Tabasco, M 11340 120 25 53 Red Universitaria Nacional, CL 27947 108 0 89 Telconet S.A, EC 3596 69 8 4 Universidad Autonoma Metropolitana, MX 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 1251 42 35 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 28614 38 2 2 Fundacao Universidade Regional de Blumena 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 573 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 327700 14 16 1 MoRENet, MZ 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 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 16509 2176 2015 1244 AMAZON-02 - Amazon.com, Inc., US 14618 1210 4749 927 AMAZON-AES - Amazon.com, Inc., US 2907 611 2169 463 SINET-AS Research Organization of Informa 36914 573 82 3 KENET-AS, KE 7497 454 180 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 680 284 1883 251 DFN Verein zur Foerderung eines Deutschen 786 214 1738 187 JANET Jisc Services Limited, GB 1237 199 72 153 KREONET-AS-KR KISTI, KR 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 573 570 KENET-AS, KE 7497 454 431 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1210 283 AMAZON-AES - Amazon.com, Inc., US 1916 291 247 Rede Nacional de Ensino e Pesquisa, BR 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 176 169 LACOE - Los Angeles County Office of Education, 2907 611 148 SINET-AS Research Organization of Information a 18558 140 136 NETBLK-RCOEK - Riverside County Office of Educa 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 - University 64011 UNALLOCATED 130.215.0.0/16 10326 WPI - Worcester Polytec 64510 DOCUMENT 185.48.234.168/32 200999 PL-CLOUDFERRO, PL 396334 UNALLOCATED 205.143.136.0/21 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.136.0/24 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.137.0/24 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.138.0/24 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.139.0/24 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.140.0/24 5078 ONENET-AS-1 - Oklahoma 396334 UNALLOCATED 205.143.141.0/24 5078 ONENET-AS-1 - Oklahoma Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 52.129.65.0/24 Origin: 14618 AMAZON-AES - Amazon.com, Inc., US 52.129.65.0/24 Transit: 16509 AMAZON-02 - Amazon.com, Inc., US 64.28.43.0/24 Origin: 14618 AMAZON-AES - Amazon.com, Inc., US 64.28.43.0/24 Transit: 16509 AMAZON-02 - Amazon.com, Inc., US 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 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 /15:152 /16:1956 /17:438 /18:486 /19:656 /20:933 /21:977 /22:1524 /23:1654 /24:12795 /25:65 /26:83 /27:47 /28:21 /29:58 /30:37 /31:40 /32:6 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 550 573 KENET-AS, KE 16509 415 2176 AMAZON-02 - Amazon.com, Inc., US 14618 364 1210 AMAZON-AES - Amazon.com, Inc., US 8895 100 103 ISU Internet Services Unit ISU, SA 1916 86 291 Rede Nacional de Ensino e Pesquisa, BR 27947 85 108 Telconet S.A, EC 31638 48 48 ASN-LEPIDA, IT 37215 38 44 MAREN, MW 200521 34 59 SEAP-AGE, ES 28614 32 38 Fundacao Universidade Regional de Blumenau, BR Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:10 3:132 5:24 8:13 12:2 13:66 14:95 15:81 16:15 18:88 23:46 24:4 31:5 35:37 37:26 38:12 40:5 41:233 42:17 44:6 45:56 46:6 47:1 49:13 50:7 52:329 54:42 58:14 59:20 60:6 61:3 62:6 63:34 64:114 65:21 66:91 67:61 68:20 69:48 70:6 72:20 74:85 75:1 76:32 77:9 78:3 79:9 80:8 81:27 82:5 83:6 84:6 85:30 86:4 87:1 88:1 89:23 91:46 92:2 93:46 94:3 95:2 96:9 97:1 98:10 99:54 101:4 102:10 103:367 104:116 107:8 108:24 109:12 110:1 111:3 113:2 114:24 116:11 117:7 118:33 119:31 121:18 122:8 123:8 124:42 125:5 128:55 129:46 130:123 131:67 132:64 133:157 134:120 135:4 136:217 137:72 138:15 139:17 140:42 141:10 142:51 143:27 144:18 145:14 146:146 147:51 148:245 149:18 150:35 151:28 152:134 153:60 154:37 155:114 156:128 157:41 158:37 159:183 160:34 161:42 162:62 163:86 164:20 165:62 166:3 167:28 168:145 169:13 170:84 171:1 172:10 173:27 174:2 175:15 176:2 177:7 178:1 179:9 180:16 181:1 182:3 184:5 185:68 186:4 187:19 188:22 190:2 191:13 192:1499 193:321 194:107 195:92 196:149 197:358 198:504 199:305 200:291 201:20 202:593 203:437 204:414 205:152 206:226 207:262 208:103 209:126 210:227 211:5 212:143 213:16 216:184 217:24 218:20 219:6 220:16 222:4 223:17 End of report