IPv4 R&E Routing Table Report 20:30 GMT Thu 11 Jun, 2026 IPv4 BGP Table (R&E) as seen at PREGINET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/PREGINET/ Analysis Summary ---------------- BGP routing table entries examined: 16284 Prefixes after maximum aggregation (per Origin AS): 9170 Deaggregation factor: 1.78 Unique aggregates announced (without unneeded subnets): 10272 Number of IPv4 prefixes with a valid ROA: 8267 Number of IPv4 prefixes with an invalid ROA: 193 Number of IPv4 prefixes with no ROA: 7824 Total ASes present in the Internet Routing Table: 2433 Prefixes per ASN: 6.69 Origin-only ASes present in the Internet Routing Table: 2088 Origin ASes announcing only one prefix: 947 Transit ASes present in the Internet Routing Table: 345 Transit-only ASes present in the Internet Routing Table: 65 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 7.4 Max AS path length visible: 50 Max AS path prepend of ASN ( 30075) 41 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: 50077 Number of 32-bit ASNs visible in the Routing Table: 641 Prefixes from 32-bit ASNs in the Routing Table: 1809 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: 3 Number of addresses announced to Internet: 150354944 Equivalent to 8 /8s, 246 /16s and 60 /24s Percentage of available address space announced: 4.1 Percentage of allocated address space announced: 4.1 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: 2078 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3498 Total APNIC prefixes after maximum aggregation: 1503 APNIC Deaggregation factor: 2.33 Prefixes being announced from the APNIC address blocks: 3497 Unique aggregates announced from the APNIC address blocks: 1588 APNIC Region origin ASes present in the Internet Routing Table: 438 APNIC Prefixes per ASN: 7.98 APNIC Region origin ASes announcing only one prefix: 187 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 5.6 Max APNIC Region AS path length visible: 12 Number of APNIC region 32-bit ASNs visible in the Routing Table: 208 Number of APNIC addresses announced to Internet: 31034880 Equivalent to 1 /8s, 217 /16s and 142 /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: 7385 Total ARIN prefixes after maximum aggregation: 4550 ARIN Deaggregation factor: 1.62 Prefixes being announced from the ARIN address blocks: 7398 Unique aggregates announced from the ARIN address blocks: 5412 ARIN Region origin ASes present in the Internet Routing Table: 1194 ARIN Prefixes per ASN: 6.20 ARIN Region origin ASes announcing only one prefix: 431 ARIN Region transit ASes present in the Internet Routing Table: 153 Average ARIN Region AS path length visible: 8.7 Max ARIN Region AS path length visible: 50 Number of ARIN region 32-bit ASNs visible in the Routing Table: 211 Number of ARIN addresses announced to Internet: 65545728 Equivalent to 3 /8s, 232 /16s and 38 /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: 3209 Total RIPE prefixes after maximum aggregation: 2552 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3199 Unique aggregates announced from the RIPE address blocks: 2591 RIPE Region origin ASes present in the Internet Routing Table: 567 RIPE Prefixes per ASN: 5.64 RIPE Region origin ASes announcing only one prefix: 257 RIPE Region transit ASes present in the Internet Routing Table: 98 Average RIPE Region AS path length visible: 6.1 Max RIPE Region AS path length visible: 15 Number of RIPE region 32-bit ASNs visible in the Routing Table: 143 Number of RIPE addresses announced to Internet: 47543296 Equivalent to 2 /8s, 213 /16s and 116 /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 196608-219547 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: 1067 Total LACNIC prefixes after maximum aggregation: 404 LACNIC Deaggregation factor: 2.64 Prefixes being announced from the LACNIC address blocks: 1066 Unique aggregates announced from the LACNIC address blocks: 490 LACNIC Region origin ASes present in the Internet Routing Table: 125 LACNIC Prefixes per ASN: 8.53 LACNIC Region origin ASes announcing only one prefix: 51 LACNIC Region transit ASes present in the Internet Routing Table: 22 Average LACNIC Region AS path length visible: 8.7 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 58 Number of LACNIC addresses announced to Internet: 3811840 Equivalent to 0 /8s, 58 /16s and 42 /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: 1122 Total AfriNIC prefixes after maximum aggregation: 158 AfriNIC Deaggregation factor: 7.10 Prefixes being announced from the AfriNIC address blocks: 1121 Unique aggregates announced from the AfriNIC address blocks: 188 AfriNIC Region origin ASes present in the Internet Routing Table: 41 AfriNIC Prefixes per ASN: 27.34 AfriNIC Region origin ASes announcing only one prefix: 21 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 7.2 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 21 Number of AfriNIC addresses announced to Internet: 2416640 Equivalent to 0 /8s, 36 /16s and 224 /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 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 1659 228 1450 34 ERX-TANET-ASN1 - Taiwan Academic Network 1237 199 72 154 KREONET-AS-KR-KR - KISTI, KR 4538 182 4191 71 ERX-CERNET-BKB - China Education and Rese 55824 152 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 4621 58 35 8 UNINET-AS-AP - UNINET-TH, TH 9317 51 16 1 ITISNET-AS-KR - INHA UNIVERSITY, KR 9903 46 3 3 RIT-AS-AP - Rajamangala Institute of Tech Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 578 117 330 CENIC-2152 - CENIC, US 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 150 RISQ-AS - Reseau d'Informations Scientifi 81 115 455 35 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 2920 85 15 76 LACOE - Los Angeles County Office of Educ 237 83 542 49 MERIT-AS-14 - Merit Network Inc., US 1736 79 16 1 MU-AS - Marquette University, US 3477 78 63 41 NOAA-NWAVE - National Oceanic and Atmosph 22742 70 37 32 CT-EDU-NET - Connecticut Education Networ Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 293 1884 255 DFN - Verein zur Foerderung eines Deutsch 786 210 1684 192 JANET - Jisc Services Limited, GB 559 115 533 105 Switch - SWITCH, CH 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 200521 58 4 24 SEAP-AGE - Ministerio de Transformacion D Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 219 161 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 52 3 21 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/PREGINET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 556 82 3 Kenya Education Network - Kenya Education 2018 373 318 69 TENET (The UNINET Project) - TENET (The U 8094 46 48 21 North West University - North West Univer 37215 45 8 1 Malawi Research and Education Network - M 327700 13 16 1 Mozambique Research & Education Network - 37501 11 49 6 University of the Free State - University 37182 10 8 1 Tanzania Education And Research Network - 37654 10 1 6 Rwanda Ministry of Education - Rwanda Min 36982 8 33 8 University of Cape Town - University of C 327798 4 0 3 BURUNDI EDUCATION AND RESEARCH NETWORK - Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 578 117 330 CENIC-2152 - CENIC, US 36914 556 82 3 Kenya Education Network - Kenya Education 7497 465 212 24 CSTNET-AS-AP - Computer Network Informati 2018 373 318 69 TENET (The UNINET Project) - TENET (The U 680 293 1884 255 DFN - Verein zur Foerderung eines Deutsch 1659 228 1450 34 ERX-TANET-ASN1 - Taiwan Academic Network 1916 219 161 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 Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 556 553 Kenya Education Network - Kenya Education Netwo 7497 465 441 CSTNET-AS-AP - Computer Network Information Cen 2018 373 304 TENET (The UNINET Project) - TENET (The UNINET 5786 197 196 UPRENET - University of Puerto Rico, PR 1659 228 194 ERX-TANET-ASN1 - Taiwan Academic Network (TANet 1916 219 179 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 55824 152 132 NKN-CORE-NW - NKN Core Network, IN 4538 182 111 ERX-CERNET-BKB - China Education and Research N 8895 98 93 ISU - King Abdul Aziz City for Science and Tech 81 115 80 NCREN - MCNC, US Complete listing at https://bgp.nsrc.org/REN/PREGINET/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/PREGINET/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 Nigerian Research and Education Network 164.160.192.0/21 Transit: 37288 West and Central African Research Networ 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/PREGINET/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 /9:0 /10:0 /11:1 /12:8 /13:17 /14:30 /15:103 /16:1551 /17:352 /18:392 /19:527 /20:727 /21:764 /22:1266 /23:1413 /24:9132 /25:1 /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 532 556 Kenya Education Network - Kenya Education Network, KE 8895 95 98 ISU - King Abdul Aziz City for Science and Technology, SA 2152 78 578 CENIC-2152 - CENIC, US 31638 48 48 ASN-LEPIDA - Lepida S.c.p.A., IT 37215 39 45 Malawi Research and Education Network - MAREN - Malawi Research and Education Network - MAREN, MW 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 40326 29 33 ECKERD-COLLEGE - Eckerd College, US 18632 28 59 VOLCANO-VISION - Volcano Vision, Inc., US Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:19 8:13 12:2 14:96 23:11 24:2 31:1 35:3 37:25 38:12 40:1 41:236 42:16 44:5 45:32 46:4 47:1 49:11 50:8 58:13 59:4 60:6 61:3 62:6 63:5 64:41 65:8 66:59 67:40 68:7 69:10 70:3 72:6 74:56 76:25 77:4 78:3 79:6 80:6 81:27 82:3 83:7 84:6 85:26 86:4 87:1 89:17 91:34 93:13 94:2 95:2 96:5 97:1 98:3 101:5 102:6 103:265 104:53 107:13 108:9 109:12 111:3 113:2 114:24 116:9 117:5 118:1 119:36 121:17 122:8 123:8 124:42 125:3 128:36 129:49 130:93 131:66 132:60 133:23 134:104 136:198 137:107 138:3 139:5 140:84 141:7 142:32 143:23 144:7 145:11 146:135 147:64 148:73 149:11 150:31 151:8 152:122 153:14 154:40 155:85 156:28 157:24 158:25 159:111 160:8 161:33 162:24 163:34 164:9 165:48 166:1 167:33 168:80 169:5 170:26 171:1 172:1 174:1 175:4 177:8 179:12 180:16 181:1 182:3 184:2 185:41 186:4 187:10 188:22 190:17 191:13 192:1237 193:258 194:111 195:51 196:148 197:344 198:529 199:204 200:307 201:5 202:378 203:358 204:267 205:166 206:167 207:255 208:38 209:146 210:228 211:15 212:135 213:4 216:81 217:22 218:21 219:2 220:16 222:4 223:16 End of report