IPv4 R&E Routing Table Report 18:35 GMT Tue 26 May, 2026 IPv4 BGP Table (R&E) as seen at KENET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/KENET/ Analysis Summary ---------------- BGP routing table entries examined: 17270 Prefixes after maximum aggregation (per Origin AS): 9637 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 10600 Number of IPv4 prefixes with a valid ROA: 7455 Number of IPv4 prefixes with an invalid ROA: 5 Number of IPv4 prefixes with no ROA: 9810 Total ASes present in the Internet Routing Table: 2520 Prefixes per ASN: 6.85 Origin-only ASes present in the Internet Routing Table: 2184 Origin ASes announcing only one prefix: 974 Transit ASes present in the Internet Routing Table: 336 Transit-only ASes present in the Internet Routing Table: 60 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.2 Max AS path length visible: 15 Max AS path prepend of ASN ( 10497) 11 Prefixes from unregistered ASNs in the Routing Table: 3 Number of instances of unregistered ASNs: 3 Number of 32-bit ASNs allocated by the RIRs: 49887 Number of 32-bit ASNs visible in the Routing Table: 658 Prefixes from 32-bit ASNs in the Routing Table: 1774 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: 2 Number of addresses announced to Internet: 192695808 Equivalent to 11 /8s, 124 /16s and 78 /24s Percentage of available address space announced: 5.2 Percentage of allocated address space announced: 5.2 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: 1923 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4796 Total APNIC prefixes after maximum aggregation: 2350 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4797 Unique aggregates announced from the APNIC address blocks: 2608 APNIC Region origin ASes present in the Internet Routing Table: 607 APNIC Prefixes per ASN: 7.90 APNIC Region origin ASes announcing only one prefix: 262 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 5.6 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 253 Number of APNIC addresses announced to Internet: 45600768 Equivalent to 2 /8s, 183 /16s and 208 /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: 6964 Total ARIN prefixes after maximum aggregation: 3998 ARIN Deaggregation factor: 1.74 Prefixes being announced from the ARIN address blocks: 6978 Unique aggregates announced from the ARIN address blocks: 4437 ARIN Region origin ASes present in the Internet Routing Table: 1117 ARIN Prefixes per ASN: 6.25 ARIN Region origin ASes announcing only one prefix: 390 ARIN Region transit ASes present in the Internet Routing Table: 141 Average ARIN Region AS path length visible: 5.4 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 192 Number of ARIN addresses announced to Internet: 84321024 Equivalent to 5 /8s, 6 /16s and 163 /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, 393216-404380 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: 3399 Total RIPE prefixes after maximum aggregation: 2712 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3386 Unique aggregates announced from the RIPE address blocks: 2756 RIPE Region origin ASes present in the Internet Routing Table: 597 RIPE Prefixes per ASN: 5.67 RIPE Region origin ASes announcing only one prefix: 267 RIPE Region transit ASes present in the Internet Routing Table: 101 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: 152 Number of RIPE addresses announced to Internet: 57271552 Equivalent to 3 /8s, 105 /16s and 229 /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: 1072 Total LACNIC prefixes after maximum aggregation: 405 LACNIC Deaggregation factor: 2.65 Prefixes being announced from the LACNIC address blocks: 1071 Unique aggregates announced from the LACNIC address blocks: 493 LACNIC Region origin ASes present in the Internet Routing Table: 125 LACNIC Prefixes per ASN: 8.57 LACNIC Region origin ASes announcing only one prefix: 51 LACNIC Region transit ASes present in the Internet Routing Table: 21 Average LACNIC Region AS path length visible: 5.7 Max LACNIC Region AS path length visible: 10 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 57 Number of LACNIC addresses announced to Internet: 3820288 Equivalent to 0 /8s, 58 /16s and 75 /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: 1036 Total AfriNIC prefixes after maximum aggregation: 169 AfriNIC Deaggregation factor: 6.13 Prefixes being announced from the AfriNIC address blocks: 1036 Unique aggregates announced from the AfriNIC address blocks: 304 AfriNIC Region origin ASes present in the Internet Routing Table: 11 AfriNIC Prefixes per ASN: 94.18 AfriNIC Region origin ASes announcing only one prefix: 4 AfriNIC Region transit ASes present in the Internet Routing Table: 5 Average AfriNIC Region AS path length visible: 2.1 Max AfriNIC Region AS path length visible: 6 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4 Number of AfriNIC addresses announced to Internet: 1681664 Equivalent to 0 /8s, 25 /16s and 169 /24s AfriNIC AS Blocks 36864-37887, 327680-330751 & 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 606 2153 464 SINET-AS - Research Organization of Infor 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 1237 199 72 154 KREONET-AS-KR-KR - KISTI, KR 4538 191 4191 72 ERX-CERNET-BKB - China Education and Rese 58647 182 18 2 KAGAWAU-AS - Kagawa University, JP 7575 166 281 113 AARNET-AS-AP - Australian Academic and Re 55824 151 19 20 NKN-CORE-NW - NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS - Mahidol University, T 6262 63 134 56 CSIRO - Commonwealth Scientific and Indus 1659 61 1466 35 ERX-TANET-ASN1 - Taiwan Academic Network Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 5786 197 16 1 UPRENET - University of Puerto Rico, PR 668 187 585 160 DNIC-AS-00668 - United States Department 2920 173 34 7 LACOE - Los Angeles County Office of Educ 2152 145 491 95 CENIC-2152 - CENIC, US 18558 140 18 4 NETBLK-RCOEK - Riverside County Office of 81 115 455 35 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 270 84 247 34 AS270 - National Aeronautics and Space Ad 237 83 542 49 MERIT-AS-14 - Merit Network Inc., US 3477 82 79 40 NOAA-NWAVE - National Oceanic and Atmosph Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 291 1883 253 DFN - Verein zur Foerderung eines Deutsch 786 210 1684 192 JANET - Jisc Services Limited, GB 559 115 533 105 Switch - SWITCH, CH 1103 100 1759 85 SURFNET-NL - SURF B.V., NL 8895 98 24 5 ISU - King Abdul Aziz City for Science an 2614 87 26 67 RoEduNet - Agentia de Administrare a Rete 137 82 677 77 ASGARR - Consortium GARR, IT 1930 78 88 73 RCCN - Fundacao para a Ciencia e a Tecnol 553 75 366 75 BELWUE - Universitaet Stuttgart, DE 2200 64 630 59 FR-RENATER - Renater, FR Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 220 161 40 AS1916 - Rede Nacional de Ensino e Pesqui 11340 110 25 49 AS11340 - Red Universitaria Nacional, CL 3596 66 8 4 AS3596 - Universidad Autonoma Metropolita 271640 65 8 1 AS271640 - UNIVERSIDADE FEDERAL DE VICOSA 2715 57 84 39 AS2715 - Fundacao Carlos Chagas Filho de 19611 53 17 2 AS19611 - Associacao Antonio Vieira - Uni 61468 51 3 20 AS61468 - CEDIA, EC 1251 37 31 26 AS1251 - FUNDACAO DE AMPARO A PESQUISA DO 21612 27 16 1 AS21612 - FUNDACAO INSTITUTO OSWALDO CRUZ 20191 26 16 1 AS20191 - Pontificia Universidad Catolica Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 555 80 49 Kenya Education Network - Kenya Education 2018 374 318 69 TENET (The UNINET Project) - TENET (The U 2561 68 4 34 Egyptian Universities Network (EUN) - Egy 6879 24 2 9 ENSTINET - ENSTINET, EG 30983 4 4 1 CNRST (Centre National pour la Recherche 329522 4 1 2 South African National Space Agency (SANS 328225 3 0 1 Strathmore University - Strathmore Univer 3208 1 2 1 Algerian Academic Research Network - Alge 6149 1 0 1 TENET (The UNINET Project) - TENET (The U 327945 1 0 1 International Livestock Research Institut Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 606 2153 464 SINET-AS - Research Organization of Infor 36914 555 80 49 Kenya Education Network - Kenya Education 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 2018 374 318 69 TENET (The UNINET Project) - TENET (The U 680 291 1883 253 DFN - Verein zur Foerderung eines Deutsch 1916 220 161 40 AS1916 - Rede Nacional de Ensino e Pesqui 786 210 1684 192 JANET - Jisc Services Limited, GB 1237 199 72 154 KREONET-AS-KR-KR - KISTI, KR 5786 197 16 1 UPRENET - University of Puerto Rico, PR 4538 191 4191 72 ERX-CERNET-BKB - China Education and Rese Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 555 506 Kenya Education Network - Kenya Education Netwo 7497 465 441 CSTNET-AS-AP - Computer Network Information Cen 2018 374 305 TENET (The UNINET Project) - TENET (The UNINET 5786 197 196 UPRENET - University of Puerto Rico, PR 1916 220 180 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 58647 182 180 KAGAWAU-AS - Kagawa University, JP 2920 173 166 LACOE - Los Angeles County Office of Education, 18558 140 136 NETBLK-RCOEK - Riverside County Office of Educa 55824 151 131 NKN-CORE-NW - NKN Core Network, IN 4538 191 119 ERX-CERNET-BKB - China Education and Research N Complete listing at https://bgp.nsrc.org/REN/KENET/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 401367 UNALLOCATED 216.186.25.0/24 10430 WA-K20 - Washington Sta Complete listing at https://bgp.nsrc.org/REN/KENET/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 202.14.117.0/24 Origin: 17827 STOU-AS-TH - Sukhothai Thammathirat Open 202.14.117.0/24 Transit: 4621 UNINET-AS-AP - UNINET-TH, TH 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP - Adelaide Uni 203.9.156.0/24 Transit: 7575 AARNET-AS-AP - Australian Academic and R Complete listing at https://bgp.nsrc.org/REN/KENET/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 /11:1 /12:11 /13:18 /14:35 /15:114 /16:1875 /17:404 /18:427 /19:560 /20:785 /21:829 /22:1286 /23:1440 /24:9483 /25:0 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 532 555 Kenya Education Network - Kenya Education Network, KE 8895 95 98 ISU - King Abdul Aziz City for Science and Technology, SA 31638 48 48 ASN-LEPIDA - Lepida S.c.p.A., IT 200521 34 58 SEAP-AGE - Ministerio de Transformacion Digital y de la Funcion Publica, ES 46115 32 35 LUTHER - Luther College, US 25977 30 44 HCCS - HOUSTON COMMUNITY COLLEGE SYSTEM, US 27609 29 45 USC-UNIVERSITY-HOSPITAL - USC-University Hospital, US 40326 29 33 ECKERD-COLLEGE - Eckerd College, US 61468 25 51 AS61468 - CEDIA, EC 36794 24 26 META SOLUTIONS PIKETON - META Solutions, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:19 6:5 8:2 12:2 14:95 23:8 24:2 31:1 35:3 37:26 38:10 40:1 41:181 42:20 44:6 45:36 46:4 47:1 49:13 50:3 58:14 59:20 60:6 61:3 62:6 63:32 64:43 65:6 66:42 67:39 68:13 69:18 70:3 72:6 74:56 76:26 77:4 78:3 79:6 80:7 81:27 82:3 83:7 84:4 85:26 86:4 87:1 89:17 91:36 93:14 94:2 95:2 97:1 98:2 101:5 102:1 103:353 104:76 108:9 109:13 110:1 111:6 113:2 114:24 116:9 117:5 118:33 119:36 121:18 122:8 123:8 124:42 125:3 128:56 129:45 130:99 131:48 132:55 133:157 134:109 136:199 137:62 138:10 139:4 140:33 141:8 143:18 144:5 145:13 146:136 147:66 148:70 149:11 150:36 151:8 152:126 153:15 154:25 155:88 156:128 157:27 158:28 159:111 160:34 161:39 162:20 163:81 164:10 165:49 166:1 167:7 168:104 169:7 170:17 171:1 172:1 173:5 175:15 177:8 179:12 180:16 181:1 182:11 184:6 185:40 186:4 187:8 188:22 190:17 191:13 192:1355 193:306 194:127 195:97 196:137 197:343 198:328 199:171 200:312 201:5 202:612 203:432 204:344 205:55 206:113 207:154 208:33 209:69 210:232 211:15 212:135 213:4 214:8 216:73 217:22 218:21 219:7 220:16 222:4 223:17 End of report