IPv4 R&E Routing Table Report 20:30 GMT Wed 31 Dec, 2025 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: 4372 Prefixes after maximum aggregation (per Origin AS): 2896 Deaggregation factor: 1.51 Unique aggregates announced (without unneeded subnets): 2864 Number of IPv4 prefixes with a valid ROA: 2571 Number of IPv4 prefixes with an invalid ROA: 11 Number of IPv4 prefixes with no ROA: 1790 Total ASes present in the Internet Routing Table: 763 Prefixes per ASN: 5.73 Origin-only ASes present in the Internet Routing Table: 644 Origin ASes announcing only one prefix: 327 Transit ASes present in the Internet Routing Table: 119 Transit-only ASes present in the Internet Routing Table: 28 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: 48315 Number of 32-bit ASNs visible in the Routing Table: 273 Prefixes from 32-bit ASNs in the Routing Table: 711 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: 62754304 Equivalent to 3 /8s, 189 /16s and 142 /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: 1449 Total APNIC prefixes after maximum aggregation: 551 APNIC Deaggregation factor: 2.63 Prefixes being announced from the APNIC address blocks: 1448 Unique aggregates announced from the APNIC address blocks: 463 APNIC Region origin ASes present in the Internet Routing Table: 219 APNIC Prefixes per ASN: 6.61 APNIC Region origin ASes announcing only one prefix: 90 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: 17917440 Equivalent to 1 /8s, 17 /16s and 102 /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: 22 Total ARIN prefixes after maximum aggregation: 13 ARIN Deaggregation factor: 1.69 Prefixes being announced from the ARIN address blocks: 28 Unique aggregates announced from the ARIN address blocks: 28 ARIN Region origin ASes present in the Internet Routing Table: 6 ARIN Prefixes per ASN: 4.67 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: 5.8 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: 73216 Equivalent to 0 /8s, 1 /16s and 30 /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: 2818 Total RIPE prefixes after maximum aggregation: 2310 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2812 Unique aggregates announced from the RIPE address blocks: 2344 RIPE Region origin ASes present in the Internet Routing Table: 496 RIPE Prefixes per ASN: 5.67 RIPE Region origin ASes announcing only one prefix: 227 RIPE Region transit ASes present in the Internet Routing Table: 89 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: 132 Number of RIPE addresses announced to Internet: 44475648 Equivalent to 2 /8s, 166 /16s and 165 /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: 82 Total AfriNIC prefixes after maximum aggregation: 21 AfriNIC Deaggregation factor: 3.90 Prefixes being announced from the AfriNIC address blocks: 82 Unique aggregates announced from the AfriNIC address blocks: 27 AfriNIC Region origin ASes present in the Internet Routing Table: 13 AfriNIC Prefixes per ASN: 6.31 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: 6.0 Max AfriNIC Region AS path length visible: 8 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5 Number of AfriNIC addresses announced to Internet: 287488 Equivalent to 0 /8s, 4 /16s and 99 /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 47065 15 1 6 PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065 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 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 680 285 1883 251 DFN Verein zur Foerderung eines Deutschen 786 208 1738 186 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 77 88 72 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 58 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 327700 12 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 327798 4 0 3 BERNET, BI 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 37010 1 0 1 National-University-Rwanda, RW 37467 1 16 1 ETherNeT, ET 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 680 285 1883 251 DFN Verein zur Foerderung eines Deutschen 786 208 1738 186 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 77 88 72 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 58 34 SEAP-AGE, ES 132524 43 34 TIFR-AS Tata Institute of Fundamental Research, 31638 48 27 ASN-LEPIDA, IT 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 /15:73 /16:615 /17:67 /18:59 /19:112 /20:204 /21:262 /22:373 /23:356 /24:2212 /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 33 58 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 88 ROEDUNET, RO 20545 15 17 GRENA-AS Tbilisi, Georgia, GE 47065 15 15 PEERING-RESEARCH-TESTBED-USC-UFMG-AS47065, US 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 41:48 42:13 44:1 45:15 46:4 49:6 58:14 59:18 62:5 66:1 69:1 74:4 77:7 78:3 79:9 80:6 81:27 82:3 83:6 84:6 85:26 86:1 89:15 91:32 93:13 94:2 95:2 101:3 102:1 103:200 109:1 111:3 118:32 119:8 121:16 122:8 128:2 129:7 131:6 134:3 137:4 138:2 139:1 143:2 144:3 145:12 146:1 147:4 148:7 150:2 151:2 153:12 154:14 156:1 157:3 158:27 159:1 160:4 161:6 162:1 163:2 165:1 180:15 182:3 184:15 185:35 188:18 192:424 193:234 194:89 195:49 196:8 200:1 202:279 203:127 210:10 211:1 212:42 213:4 216:1 217:22 219:1 220:3 222:3 End of report