IPv4 R&E Routing Table Report 20:30 GMT Tue 03 Feb, 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: 4103 Prefixes after maximum aggregation (per Origin AS): 2798 Deaggregation factor: 1.47 Unique aggregates announced (without unneeded subnets): 2728 Number of IPv4 prefixes with a valid ROA: 2382 Number of IPv4 prefixes with an invalid ROA: 20 Number of IPv4 prefixes with no ROA: 1701 Total ASes present in the Internet Routing Table: 691 Prefixes per ASN: 5.94 Origin-only ASes present in the Internet Routing Table: 585 Origin ASes announcing only one prefix: 303 Transit ASes present in the Internet Routing Table: 106 Transit-only ASes present in the Internet Routing Table: 22 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.6 Max AS path length visible: 15 Max AS path prepend of ASN ( 43066) 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: 48558 Number of 32-bit ASNs visible in the Routing Table: 234 Prefixes from 32-bit ASNs in the Routing Table: 605 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: 61943552 Equivalent to 3 /8s, 177 /16s and 47 /24s Percentage of available address space announced: 1.7 Percentage of allocated address space announced: 1.7 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: 479 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 1297 Total APNIC prefixes after maximum aggregation: 502 APNIC Deaggregation factor: 2.58 Prefixes being announced from the APNIC address blocks: 1296 Unique aggregates announced from the APNIC address blocks: 388 APNIC Region origin ASes present in the Internet Routing Table: 181 APNIC Prefixes per ASN: 7.16 APNIC Region origin ASes announcing only one prefix: 80 APNIC Region transit ASes present in the Internet Routing Table: 19 Average APNIC Region AS path length visible: 5.2 Max APNIC Region AS path length visible: 12 Number of APNIC region 32-bit ASNs visible in the Routing Table: 101 Number of APNIC addresses announced to Internet: 17830656 Equivalent to 1 /8s, 16 /16s and 19 /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: 5 Total ARIN prefixes after maximum aggregation: 5 ARIN Deaggregation factor: 1.00 Prefixes being announced from the ARIN address blocks: 11 Unique aggregates announced from the ARIN address blocks: 11 ARIN Region origin ASes present in the Internet Routing Table: 4 ARIN Prefixes per ASN: 2.75 ARIN Region origin ASes announcing only one prefix: 3 ARIN Region transit ASes present in the Internet Routing Table: 0 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 6 Number of ARIN region 32-bit ASNs visible in the Routing Table: 0 Number of ARIN addresses announced to Internet: 68864 Equivalent to 0 /8s, 1 /16s and 13 /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: 2800 Total RIPE prefixes after maximum aggregation: 2290 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2794 Unique aggregates announced from the RIPE address blocks: 2327 RIPE Region origin ASes present in the Internet Routing Table: 483 RIPE Prefixes per ASN: 5.78 RIPE Region origin ASes announcing only one prefix: 219 RIPE Region transit ASes present in the Internet Routing Table: 81 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: 133 Number of RIPE addresses announced to Internet: 44043520 Equivalent to 2 /8s, 160 /16s and 13 /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: 1 Total LACNIC prefixes after maximum aggregation: 1 LACNIC Deaggregation factor: 1.00 Prefixes being announced from the LACNIC address blocks: 1 Unique aggregates announced from the LACNIC address blocks: 1 LACNIC Region origin ASes present in the Internet Routing Table: 1 LACNIC Prefixes per ASN: 1.00 LACNIC Region origin ASes announcing only one prefix: 1 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: 256 Equivalent to 0 /8s, 0 /16s and 1 /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: 0 Total AfriNIC prefixes after maximum aggregation: 0 AfriNIC Deaggregation factor: -nan Prefixes being announced from the AfriNIC address blocks: 0 Unique aggregates announced from the AfriNIC address blocks: 0 AfriNIC Region origin ASes present in the Internet Routing Table: 0 AfriNIC Prefixes per ASN: -nan AfriNIC Region origin ASes announcing only one prefix: 0 AfriNIC Region transit ASes present in the Internet Routing Table: 0 Average AfriNIC Region AS path length visible: -nan Max AfriNIC Region AS path length visible: 0 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0 Number of AfriNIC addresses announced to Internet: 0 Equivalent to 0 /8s, 0 /16s and 0 /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 4538 182 4192 72 ERX-CERNET-BKB China Education and Resear 55824 153 19 22 NKN-CORE-NW NKN Core Network, IN 4621 56 35 8 UNINET-AS-AP UNINET-, TH 38280 50 3 2 MONASHUNI-MY-AS-AP Monash University Sunw 9903 46 3 3 RIT-AS-AP Rajamangala Institute of Techno 132524 43 9 9 TIFR-AS Tata Institute of Fundamental Res 24361 33 56 17 CNGI-NJ-IX-AS-AP CERNET2 IX at Southeast 141005 32 21 22 SDEPN-AS-CN Shandong Provincial Departmen 24514 25 1 7 MYREN-MY MINISTRY OF HIGHER EDUCATION MAL 4762 22 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 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 1288 2 0 2 PCH-LOCAL-TRANSIT - Packet Clearing House 12 1 0 1 NYU-DOMAIN - New York University, US 3856 1 0 1 PCH-AS - Packet Clearing House, Inc., US 31951 1 0 1 NASADSN-AS - NASA Deep Space Network DSN, 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 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 786 209 1733 188 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 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 200521 59 4 24 SEAP-AGE, ES 31638 48 3 21 ASN-LEPIDA, 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 14650 1 0 1 Nucleo de Inf. e Coord. do Ponto BR - NIC 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 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 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 786 209 1733 188 JANET Jisc Services Limited, GB 4538 182 4192 72 ERX-CERNET-BKB China Education and Resear 55824 153 19 22 NKN-CORE-NW NKN Core Network, IN 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 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/PREGINET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 55824 153 131 NKN-CORE-NW NKN Core Network, IN 4538 182 110 ERX-CERNET-BKB China Education and Research Net 4621 56 48 UNINET-AS-AP UNINET-, TH 38280 50 48 MONASHUNI-MY-AS-AP Monash University Sunway Cam 9903 46 43 RIT-AS-AP Rajamangala Institute of Technology, 200521 59 35 SEAP-AGE, ES 132524 43 34 TIFR-AS Tata Institute of Fundamental Research, 31638 48 27 ASN-LEPIDA, IT 1712 27 25 FR-RENATER-ENST Ecole Nationale Superieure des 786 209 21 JANET Jisc Services Limited, GB 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 U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, 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 /12:7 /13:13 /14:19 /15:72 /16:606 /17:64 /18:59 /19:117 /20:197 /21:258 /22:348 /23:337 /24:2006 /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 31638 48 48 ASN-LEPIDA, IT 200521 34 59 SEAP-AGE, ES 3233 18 30 ICI-ROTLD National Institute for Research and Development in Informatics - ICI Bucharest, RO 47623 18 22 IIAP-ASNET-AS, AM 60187 18 39 LGFL-AS, GB 28949 16 17 TUSNET-AS 8, Kliment Ohridski St., BG 2614 15 87 ROEDUNET, RO 20545 15 17 GRENA-AS Tbilisi, Georgia, GE 5408 13 40 GR-NET www.grnet.gr, GR 8456 7 18 ASBOUN, TR Complete listing at https://bgp.nsrc.org/REN/PREGINET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 5:17 14:95 31:1 37:25 42:13 44:1 45:15 46:4 49:6 58:14 59:18 62:5 66:1 69:1 74:4 77:3 78:3 79:9 80:6 81:27 82:3 83:6 84:6 85:26 86:1 89:15 91:31 93:13 94:2 95:2 101:3 103:133 109:1 111:3 118:32 119:8 121:16 122:8 128:2 129:7 131:6 134:3 137:4 138:2 143:2 144:3 145:12 146:1 147:4 148:7 150:2 151:2 153:12 156:1 157:3 158:24 159:1 160:3 161:4 162:1 163:2 165:1 180:15 182:2 185:35 188:20 192:421 193:235 194:89 195:49 196:6 200:1 202:231 203:129 210:10 211:1 212:42 213:4 216:1 217:22 219:1 220:3 222:3 End of report