IPv4 R&E Routing Table Report 20:30 GMT Mon 12 Jan, 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: 4396 Prefixes after maximum aggregation (per Origin AS): 2896 Deaggregation factor: 1.52 Unique aggregates announced (without unneeded subnets): 2839 Number of IPv4 prefixes with a valid ROA: 2621 Number of IPv4 prefixes with an invalid ROA: 11 Number of IPv4 prefixes with no ROA: 1764 Total ASes present in the Internet Routing Table: 766 Prefixes per ASN: 5.74 Origin-only ASes present in the Internet Routing Table: 644 Origin ASes announcing only one prefix: 325 Transit ASes present in the Internet Routing Table: 122 Transit-only ASes present in the Internet Routing Table: 30 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.7 Max AS path length visible: 15 Max AS path prepend of ASN ( 55479) 10 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: 48351 Number of 32-bit ASNs visible in the Routing Table: 276 Prefixes from 32-bit ASNs in the Routing Table: 717 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: 63219712 Equivalent to 3 /8s, 196 /16s and 168 /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: 551 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 1452 Total APNIC prefixes after maximum aggregation: 553 APNIC Deaggregation factor: 2.63 Prefixes being announced from the APNIC address blocks: 1451 Unique aggregates announced from the APNIC address blocks: 450 APNIC Region origin ASes present in the Internet Routing Table: 219 APNIC Prefixes per ASN: 6.63 APNIC Region origin ASes announcing only one prefix: 89 APNIC Region transit ASes present in the Internet Routing Table: 19 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 136 Number of APNIC addresses announced to Internet: 17921792 Equivalent to 1 /8s, 17 /16s and 119 /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: 8 Total ARIN prefixes after maximum aggregation: 8 ARIN Deaggregation factor: 1.00 Prefixes being announced from the ARIN address blocks: 15 Unique aggregates announced from the ARIN address blocks: 15 ARIN Region origin ASes present in the Internet Routing Table: 6 ARIN Prefixes per ASN: 2.50 ARIN Region origin ASes announcing only one prefix: 4 ARIN Region transit ASes present in the Internet Routing Table: 0 Average ARIN Region AS path length visible: 5.5 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: 70144 Equivalent to 0 /8s, 1 /16s and 18 /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: 2815 Total RIPE prefixes after maximum aggregation: 2309 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2808 Unique aggregates announced from the RIPE address blocks: 2341 RIPE Region origin ASes present in the Internet Routing Table: 495 RIPE Prefixes per ASN: 5.67 RIPE Region origin ASes announcing only one prefix: 225 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: 134 Number of RIPE addresses announced to Internet: 44603392 Equivalent to 2 /8s, 168 /16s and 152 /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: 120 Total AfriNIC prefixes after maximum aggregation: 25 AfriNIC Deaggregation factor: 4.80 Prefixes being announced from the AfriNIC address blocks: 120 Unique aggregates announced from the AfriNIC address blocks: 31 AfriNIC Region origin ASes present in the Internet Routing Table: 15 AfriNIC Prefixes per ASN: 8.00 AfriNIC Region origin ASes announcing only one prefix: 6 AfriNIC Region transit ASes present in the Internet Routing Table: 5 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: 6 Number of AfriNIC addresses announced to Internet: 623872 Equivalent to 0 /8s, 9 /16s and 133 /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 183 4192 72 ERX-CERNET-BKB China Education and Resear 55824 153 19 22 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 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 Malaysian Research & Education N 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 112 2 0 2 AS112-PROJECT, US 1288 2 0 2 PCH-LOCAL-TRANSIT, US 12 1 0 1 NYU-DOMAIN, US 3856 1 0 1 PCH-AS, US 31951 1 0 1 NASADSN-AS, US 47065 1 0 1 PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 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 680 284 1883 251 DFN Verein zur Foerderung eines Deutschen 786 209 1738 187 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 2614 88 26 68 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 65 630 60 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 37215 44 8 1 MAREN, MW 36914 36 82 3 KENET-AS, KE 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 327798 4 0 3 BERNET, BI 328225 3 0 1 Strathmore-University, KE 37182 2 8 1 TERNET, TZ 37496 2 0 1 Aga-Khan-University, TZ 37532 2 20 2 ZAMREN, ZM 36944 1 1 1 UBUNTU-UNICAST-AS, MW 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 680 284 1883 251 DFN Verein zur Foerderung eines Deutschen 786 209 1738 187 JANET Jisc Services Limited, GB 4538 183 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 88 26 68 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 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 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 183 111 ERX-CERNET-BKB China Education and Research Net 4762 75 74 MAHIDOL-BORDER-AS Mahidol University, Thailand, 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, 37215 44 43 MAREN, MW 200521 59 35 SEAP-AGE, ES 132524 43 34 TIFR-AS Tata Institute of Fundamental Research, 36914 36 33 KENET-AS, KE 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 /14:21 /15:73 /16:614 /17:67 /18:59 /19:115 /20:206 /21:266 /22:378 /23:359 /24:2218 /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 37215 38 44 MAREN, MW 200521 34 59 SEAP-AGE, ES 36914 21 36 KENET-AS, KE 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 88 ROEDUNET, RO 20545 15 17 GRENA-AS Tbilisi, Georgia, GE 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 41:63 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 84:5 85:26 86:1 89:15 91:31 93:13 94:2 95:2 101:3 102:1 103:200 109:1 111:3 118:32 119:8 121:16 122:8 128:2 129:7 131:6 134:3 137:4 138:2 139:1 143:2 144:3 145:12 146:1 147:4 148:7 150:2 151:2 153:12 154:14 156:3 157:3 158:27 159:1 160:4 161:6 162:1 163:2 165:1 180:15 182:3 184:1 185:35 188:18 192:426 193:235 194:90 195:51 196:8 197:3 200:1 202:280 203:126 210:10 211:1 212:42 213:4 216:1 217:22 219:1 220:3 222:3 End of report