IPv4 R&E Routing Table Report 18:35 GMT Fri 01 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: 17369 Prefixes after maximum aggregation (per Origin AS): 9694 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 10701 Number of IPv4 prefixes with a valid ROA: 7298 Number of IPv4 prefixes with an invalid ROA: 6 Number of IPv4 prefixes with no ROA: 10065 Total ASes present in the Internet Routing Table: 2508 Prefixes per ASN: 6.93 Origin-only ASes present in the Internet Routing Table: 2173 Origin ASes announcing only one prefix: 965 Transit ASes present in the Internet Routing Table: 335 Transit-only ASes present in the Internet Routing Table: 58 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: 18 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: 49582 Number of 32-bit ASNs visible in the Routing Table: 647 Prefixes from 32-bit ASNs in the Routing Table: 1756 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: 192858624 Equivalent to 11 /8s, 126 /16s and 202 /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: 1912 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4757 Total APNIC prefixes after maximum aggregation: 2345 APNIC Deaggregation factor: 2.03 Prefixes being announced from the APNIC address blocks: 4758 Unique aggregates announced from the APNIC address blocks: 2593 APNIC Region origin ASes present in the Internet Routing Table: 604 APNIC Prefixes per ASN: 7.88 APNIC Region origin ASes announcing only one prefix: 262 APNIC Region transit ASes present in the Internet Routing Table: 52 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: 250 Number of APNIC addresses announced to Internet: 45663488 Equivalent to 2 /8s, 184 /16s and 197 /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: 6962 Total ARIN prefixes after maximum aggregation: 3978 ARIN Deaggregation factor: 1.75 Prefixes being announced from the ARIN address blocks: 6975 Unique aggregates announced from the ARIN address blocks: 4406 ARIN Region origin ASes present in the Internet Routing Table: 1110 ARIN Prefixes per ASN: 6.28 ARIN Region origin ASes announcing only one prefix: 382 ARIN Region transit ASes present in the Internet Routing Table: 140 Average ARIN Region AS path length visible: 5.4 Max ARIN Region AS path length visible: 18 Number of ARIN region 32-bit ASNs visible in the Routing Table: 188 Number of ARIN addresses announced to Internet: 84225536 Equivalent to 5 /8s, 5 /16s and 46 /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: 3393 Total RIPE prefixes after maximum aggregation: 2711 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3381 Unique aggregates announced from the RIPE address blocks: 2747 RIPE Region origin ASes present in the Internet Routing Table: 597 RIPE Prefixes per ASN: 5.66 RIPE Region origin ASes announcing only one prefix: 266 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: 150 Number of RIPE addresses announced to Internet: 57439744 Equivalent to 3 /8s, 108 /16s and 118 /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: 1228 Total LACNIC prefixes after maximum aggregation: 477 LACNIC Deaggregation factor: 2.57 Prefixes being announced from the LACNIC address blocks: 1227 Unique aggregates announced from the LACNIC address blocks: 652 LACNIC Region origin ASes present in the Internet Routing Table: 125 LACNIC Prefixes per ASN: 9.82 LACNIC Region origin ASes announcing only one prefix: 51 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 6.1 Max LACNIC Region AS path length visible: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 55 Number of LACNIC addresses announced to Internet: 3848448 Equivalent to 0 /8s, 58 /16s and 185 /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: 1026 Total AfriNIC prefixes after maximum aggregation: 180 AfriNIC Deaggregation factor: 5.70 Prefixes being announced from the AfriNIC address blocks: 1026 Unique aggregates announced from the AfriNIC address blocks: 301 AfriNIC Region origin ASes present in the Internet Routing Table: 11 AfriNIC Prefixes per ASN: 93.27 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: 1680896 Equivalent to 0 /8s, 25 /16s and 166 /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 605 2153 463 SINET-AS Research Organization of Informa 7497 458 212 24 CSTNET-AS-AP Computer Network Information 1237 199 72 154 KREONET-AS-KR KISTI, KR 4538 194 4192 73 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 166 281 113 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 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 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 146 491 96 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 81 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 Deutschen 786 210 1708 187 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 1103 100 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 8895 100 24 5 ISU Internet Services Unit ISU, SA 2614 87 26 67 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/KENET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 219 161 40 Rede Nacional de Ensino e Pesquisa, BR 28391 161 10 72 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 49 Red Universitaria Nacional, CL 3596 66 8 4 Universidad Autonoma Metropolitana, MX 271640 65 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 61468 52 3 21 CEDIA, EC 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 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 546 80 60 KENET-AS, KE 2018 373 318 69 TENET-1, ZA 2561 68 4 34 EUN, EG 6879 24 2 9 ENSTINET-, EG 30983 4 4 1 MARWAN-AS, MA 329522 4 1 2 SANSA, ZA 328225 3 0 1 Strathmore-University, KE 3208 1 2 1 ARN, DZ 6149 1 0 1 TENET-2, ZA 327945 1 0 1 ILRI, KE 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 605 2153 463 SINET-AS Research Organization of Informa 36914 546 80 60 KENET-AS, KE 7497 458 212 24 CSTNET-AS-AP Computer Network Information 2018 373 318 69 TENET-1, ZA 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 1916 219 161 40 Rede Nacional de Ensino e Pesquisa, BR 786 210 1708 187 JANET Jisc Services Limited, GB 1237 199 72 154 KREONET-AS-KR KISTI, KR 5786 197 16 1 UPRENET - University of Puerto Rico, PR 4538 194 4192 73 ERX-CERNET-BKB China Education and Resear 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 546 486 KENET-AS, KE 7497 458 434 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 TENET-1, ZA 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 1916 219 179 Rede Nacional de Ensino e Pesquisa, BR 2920 173 166 LACOE - Los Angeles County Office of Education, 18558 140 136 NETBLK-RCOEK - Riverside County Office of Educa 55824 152 131 NKN-CORE-NW NKN Core Network, IN 4538 194 121 ERX-CERNET-BKB China Education and Research Net 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 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/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 /16:1882 /17:403 /18:429 /19:559 /20:787 /21:828 /22:1280 /23:1430 /24:9590 /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 523 546 KENET-AS, KE 8895 97 100 ISU Internet Services Unit ISU, SA 31638 48 48 ASN-LEPIDA, IT 46115 32 35 LUTHER - Luther College, US 200521 32 56 SEAP-AGE, ES 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 52 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 5:18 6:5 8:2 12:2 14:95 23:8 24:2 31:1 35:3 37:26 38:10 40:1 41:176 42:20 44:6 45:36 46:4 47:1 49:13 50:4 58:15 59:20 60:6 61:3 62:6 63:32 64:43 65:6 66:42 67:39 68:12 69:18 70:3 72:6 74:56 76:26 77:4 78:3 79:5 80:7 81:27 82:3 83:7 84:4 85:26 86:4 87:1 89:17 91:37 93:14 94:2 95:2 97:1 98:2 101:5 102:1 103:350 104:76 108:9 109:11 110:1 111:6 113:2 114:24 116:9 117:5 118:33 119:27 121:17 122:8 123:8 124:42 125:3 128:56 129:43 130:99 131:44 132:56 133:157 134:108 136:199 137:62 138:10 139:4 140:33 141:6 143:20 144:5 145:13 146:136 147:66 148:230 149:11 150:36 151:9 152:126 153:15 154:24 155:87 156:128 157:27 158:28 159:112 160:34 161:35 162:19 163:81 164:10 165:48 166:1 167:6 168:104 169:7 170:17 171:1 172:1 173:5 175:15 177:7 179:12 180:16 181:1 182:11 184:6 185:40 186:4 187:8 188:22 190:17 191:13 192:1356 193:302 194:125 195:97 196:137 197:339 198:329 199:171 200:312 201:6 202:602 203:421 204:343 205:56 206:117 207:156 208:33 209:72 210:232 211:15 212:135 213:4 214:8 216:73 217:22 218:21 219:7 220:16 222:4 223:17 End of report