IPv4 R&E Routing Table Report 20:30 GMT Sun 25 Oct, 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: 5737 Prefixes after maximum aggregation (per Origin AS): 3636 Deaggregation factor: 1.58 Unique aggregates announced (without unneeded subnets): 3842 Number of IPv4 prefixes with a valid ROA: 3400 Number of IPv4 prefixes with an invalid ROA: 8 Number of IPv4 prefixes with no ROA: 2329 Total ASes present in the Internet Routing Table: 939 Prefixes per ASN: 6.11 Origin-only ASes present in the Internet Routing Table: 812 Origin ASes announcing only one prefix: 407 Transit ASes present in the Internet Routing Table: 127 Transit-only ASes present in the Internet Routing Table: 20 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.3 Max AS path length visible: 15 Max AS path prepend of ASN (199561) 9 Prefixes from unregistered ASNs in the Routing Table: 0 Number of instances of unregistered ASNs: 0 Number of 32-bit ASNs allocated by the RIRs: 51889 Number of 32-bit ASNs visible in the Routing Table: 287 Prefixes from 32-bit ASNs in the Routing Table: 693 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: 1 Number of addresses announced to Internet: 78080000 Equivalent to 4 /8s, 167 /16s and 104 /24s Percentage of available address space announced: 2.1 Percentage of allocated address space announced: 2.1 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: 562 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 2470 Total APNIC prefixes after maximum aggregation: 1002 APNIC Deaggregation factor: 2.47 Prefixes being announced from the APNIC address blocks: 2472 Unique aggregates announced from the APNIC address blocks: 1099 APNIC Region origin ASes present in the Internet Routing Table: 367 APNIC Prefixes per ASN: 6.74 APNIC Region origin ASes announcing only one prefix: 152 APNIC Region transit ASes present in the Internet Routing Table: 27 Average APNIC Region AS path length visible: 4.8 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 143 Number of APNIC addresses announced to Internet: 28149248 Equivalent to 1 /8s, 173 /16s and 134 /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: 324 Total ARIN prefixes after maximum aggregation: 264 ARIN Deaggregation factor: 1.23 Prefixes being announced from the ARIN address blocks: 329 Unique aggregates announced from the ARIN address blocks: 302 ARIN Region origin ASes present in the Internet Routing Table: 36 ARIN Prefixes per ASN: 9.14 ARIN Region origin ASes announcing only one prefix: 12 ARIN Region transit ASes present in the Internet Routing Table: 3 Average ARIN Region AS path length visible: 4.4 Max ARIN Region AS path length visible: 7 Number of ARIN region 32-bit ASNs visible in the Routing Table: 2 Number of ARIN addresses announced to Internet: 3917568 Equivalent to 0 /8s, 59 /16s and 199 /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: 2857 Total RIPE prefixes after maximum aggregation: 2350 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2849 Unique aggregates announced from the RIPE address blocks: 2415 RIPE Region origin ASes present in the Internet Routing Table: 502 RIPE Prefixes per ASN: 5.68 RIPE Region origin ASes announcing only one prefix: 235 RIPE Region transit ASes present in the Internet Routing Table: 91 Average RIPE Region AS path length visible: 5.8 Max RIPE Region AS path length visible: 15 Number of RIPE region 32-bit ASNs visible in the Routing Table: 138 Number of RIPE addresses announced to Internet: 45791232 Equivalent to 2 /8s, 186 /16s and 184 /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: 2 Total LACNIC prefixes after maximum aggregation: 2 LACNIC Deaggregation factor: 1.00 Prefixes being announced from the LACNIC address blocks: 2 Unique aggregates announced from the LACNIC address blocks: 2 LACNIC Region origin ASes present in the Internet Routing Table: 2 LACNIC Prefixes per ASN: 1.00 LACNIC Region origin ASes announcing only one prefix: 2 LACNIC Region transit ASes present in the Internet Routing Table: 0 Average LACNIC Region AS path length visible: 7.0 Max LACNIC Region AS path length visible: 7 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0 Number of LACNIC addresses announced to Internet: 512 Equivalent to 0 /8s, 0 /16s and 2 /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: 84 Total AfriNIC prefixes after maximum aggregation: 18 AfriNIC Deaggregation factor: 4.67 Prefixes being announced from the AfriNIC address blocks: 84 Unique aggregates announced from the AfriNIC address blocks: 23 AfriNIC Region origin ASes present in the Internet Routing Table: 12 AfriNIC Prefixes per ASN: 7.00 AfriNIC Region origin ASes announcing only one prefix: 6 AfriNIC Region transit ASes present in the Internet Routing Table: 3 Average AfriNIC Region AS path length visible: 6.1 Max AfriNIC Region AS path length visible: 8 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4 Number of AfriNIC addresses announced to Internet: 221184 Equivalent to 0 /8s, 3 /16s and 96 /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 463 209 20 CSTNET-AS-AP - Computer Network Informati 58647 185 18 2 KAGAWAU-AS - Kagawa University, JP 7575 168 281 115 AARNET-AS-AP - Australian Academic and Re 4538 130 4191 71 ERX-CERNET-BKB - China Education and Rese 4762 75 4 1 MAHIDOL-BORDER-AS - Mahidol University, T 6262 63 134 56 CSIRO - Commonwealth Scientific and Indus 4621 55 35 8 UNINET-AS-AP - UNINET-TH, TH 38280 50 3 2 MONASHUNI-MY-AS-AP - Monash University Su 9903 46 3 3 RIT-AS-AP - Rajamangala Institute of Tech 134096 31 3 16 EHEALTHNSW-AS-AP - eHealth NSW, AU 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 668 192 624 165 DNIC-AS-00668 - United States Department 37 17 17 5 DNIC-AS-00037 - Navy Network Information 518 15 2 7 DNIC-AS-00518 - United States Department 6360 9 62 8 UNIVHAWAII - University of Hawaii, US 13 7 19 7 DNIC-AS-00013 - Headquarters, USAISC, US 89 6 33 6 DNIC-AS-00089 - Navy Network Information 121 6 2 3 DNIC-AS-00121 - United States Department 289 6 20 6 DNIC-AS-00289 - Headquarters, USAISC, US 22 5 34 5 DNIC-AS-00022 - Navy Network Information 84 5 16 5 DNIC-AS-00084 - Navy Network Information 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 680 299 1885 258 DFN - Verein zur Foerderung eines Deutsch 786 206 1681 188 JANET - Jisc Services Limited, GB 559 117 533 106 Switch - SWITCH, CH 2614 87 26 67 RoEduNet - Agentia de Administrare a Rete 137 83 677 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 68 623 62 FR-RENATER - Renater, FR 200521 55 4 25 SEAP-AGE - Ministerio de Transformacion D 31638 50 3 22 ASN-LEPIDA - Lepida S.c.p.A., IT 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 10906 1 0 1 AS10906 - Nucleo de Inf. e Coord. do Pont 14650 1 0 1 AS14650 - Nucleo de Inf. e Coord. do Pont 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 37215 46 8 1 Malawi Research and Education Network - M 327700 12 16 1 Mozambique Research & Education Network - 37654 10 1 6 Rwanda Ministry of Education - Rwanda Min 37182 6 8 1 Tanzania Education And Research Network - 37496 2 0 1 Aga Khan University - Aga Khan University 37532 2 20 2 Zambia Research and Education Network (ZA 36944 1 1 1 Ubuntunet Alliance For Research and Educa 37010 1 0 1 National University of Rwanda - National 37085 1 0 1 The Open University of Tanzania - The Ope 328845 1 0 1 The Governing Body of College of Business 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 7497 463 209 20 CSTNET-AS-AP - Computer Network Informati 680 299 1885 258 DFN - Verein zur Foerderung eines Deutsch 786 206 1681 188 JANET - Jisc Services Limited, GB 668 192 624 165 DNIC-AS-00668 - United States Department 58647 185 18 2 KAGAWAU-AS - Kagawa University, JP 7575 168 281 115 AARNET-AS-AP - Australian Academic and Re 4538 130 4191 71 ERX-CERNET-BKB - China Education and Rese 559 117 533 106 Switch - SWITCH, CH 2614 87 26 67 RoEduNet - Agentia de Administrare a Rete 137 83 677 77 ASGARR - Consortium GARR, IT Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 58647 185 183 KAGAWAU-AS - Kagawa University, JP 4762 75 74 MAHIDOL-BORDER-AS - Mahidol University, Thailan 4538 130 59 ERX-CERNET-BKB - China Education and Research N 7575 168 53 AARNET-AS-AP - Australian Academic and Research 38280 50 48 MONASHUNI-MY-AS-AP - Monash University Sunway C 4621 55 47 UNINET-AS-AP - UNINET-TH, TH 37215 46 45 Malawi Research and Education Network - MAREN - 9903 46 43 RIT-AS-AP - Rajamangala Institute of Technology 680 299 41 DFN - Verein zur Foerderung eines Deutschen For 200521 55 30 SEAP-AGE - Ministerio de Transformacion Digital Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-CIDRnet 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 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 /11:0 /12:8 /13:13 /14:21 /15:81 /16:789 /17:102 /18:93 /19:145 /20:215 /21:283 /22:481 /23:532 /24:2962 /25:3 /26:0 /27:0 /28:1 /29:1 /30:5 /31:0 /32:2 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 31638 50 50 ASN-LEPIDA - Lepida S.c.p.A., IT 37215 40 46 Malawi Research and Education Network - MAREN - Malawi Research and Education Network - MAREN, MW 200521 32 55 SEAP-AGE - Ministerio de Transformacion Digital y de la Funcion Publica, ES 60187 26 47 LGFL-AS - London Grid for Learning Trust, GB 47623 18 22 IIAP-ASNET-AS - Institute for Informatics and Automation Problems, AM 3233 17 29 ICI-ROTLD - Institutul National de Cercetare-Dezvoltare in informatica - ICI Bucuresti, RO 28949 16 17 TUSNET-AS - Technical University of Sofia, BG 2614 15 87 RoEduNet - Agentia de Administrare a Retelei Nationale de Informatica pentru Educatie si Cercetare, RO 20545 15 17 GRENA-AS - Georgian Research and Educational Networking Association (GRENA), GE 5408 13 38 GR-NET - National Infrastructures for Research and Technology S.A., GR Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 5:20 6:5 24:1 31:2 37:25 41:54 42:5 44:5 45:9 46:4 49:8 59:16 60:6 62:5 66:1 69:1 74:4 77:4 78:3 80:8 81:27 82:3 83:7 84:6 85:26 86:1 89:17 91:25 93:16 94:2 95:1 101:2 102:1 103:187 104:1 109:2 111:3 118:33 119:36 121:1 122:8 124:41 128:2 129:12 130:10 131:13 133:147 134:7 137:4 138:10 140:1 141:1 143:8 145:11 146:1 147:6 148:7 150:10 151:2 152:3 153:15 154:10 155:3 156:11 159:98 160:3 161:10 163:10 165:3 180:2 182:3 184:1 185:43 188:20 192:590 193:212 194:92 195:50 196:3 198:20 199:35 200:2 202:359 203:280 204:7 205:7 206:4 207:2 210:94 212:41 213:5 214:8 216:1 217:22 219:3 222:1 223:5 End of report