IPv4 R&E Routing Table Report 20:30 GMT Sat 10 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: 5798 Prefixes after maximum aggregation (per Origin AS): 3650 Deaggregation factor: 1.59 Unique aggregates announced (without unneeded subnets): 3799 Number of IPv4 prefixes with a valid ROA: 3440 Number of IPv4 prefixes with an invalid ROA: 8 Number of IPv4 prefixes with no ROA: 2350 Total ASes present in the Internet Routing Table: 949 Prefixes per ASN: 6.11 Origin-only ASes present in the Internet Routing Table: 822 Origin ASes announcing only one prefix: 406 Transit ASes present in the Internet Routing Table: 127 Transit-only ASes present in the Internet Routing Table: 26 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: 51623 Number of 32-bit ASNs visible in the Routing Table: 296 Prefixes from 32-bit ASNs in the Routing Table: 738 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: 76044288 Equivalent to 4 /8s, 136 /16s and 88 /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: 584 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 2482 Total APNIC prefixes after maximum aggregation: 1002 APNIC Deaggregation factor: 2.48 Prefixes being announced from the APNIC address blocks: 2483 Unique aggregates announced from the APNIC address blocks: 1099 APNIC Region origin ASes present in the Internet Routing Table: 371 APNIC Prefixes per ASN: 6.69 APNIC Region origin ASes announcing only one prefix: 155 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: 145 Number of APNIC addresses announced to Internet: 28158464 Equivalent to 1 /8s, 173 /16s and 170 /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: 320 Total ARIN prefixes after maximum aggregation: 260 ARIN Deaggregation factor: 1.23 Prefixes being announced from the ARIN address blocks: 326 Unique aggregates announced from the ARIN address blocks: 299 ARIN Region origin ASes present in the Internet Routing Table: 34 ARIN Prefixes per ASN: 9.59 ARIN Region origin ASes announcing only one prefix: 11 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: 3916544 Equivalent to 0 /8s, 59 /16s and 195 /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: 2909 Total RIPE prefixes after maximum aggregation: 2365 RIPE Deaggregation factor: 1.23 Prefixes being announced from the RIPE address blocks: 2901 Unique aggregates announced from the RIPE address blocks: 2372 RIPE Region origin ASes present in the Internet Routing Table: 503 RIPE Prefixes per ASN: 5.77 RIPE Region origin ASes announcing only one prefix: 231 RIPE Region transit ASes present in the Internet Routing Table: 86 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: 144 Number of RIPE addresses announced to Internet: 43746560 Equivalent to 2 /8s, 155 /16s and 133 /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: 85 Total AfriNIC prefixes after maximum aggregation: 21 AfriNIC Deaggregation factor: 4.05 Prefixes being announced from the AfriNIC address blocks: 85 Unique aggregates announced from the AfriNIC address blocks: 26 AfriNIC Region origin ASes present in the Internet Routing Table: 13 AfriNIC Prefixes per ASN: 6.54 AfriNIC Region origin ASes announcing only one prefix: 7 AfriNIC Region transit ASes present in the Internet Routing Table: 4 Average AfriNIC Region AS path length visible: 6.1 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5 Number of AfriNIC addresses announced to Internet: 221952 Equivalent to 0 /8s, 3 /16s and 99 /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 462 209 20 CSTNET-AS-AP Computer Network Information 58647 185 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 115 AARNET-AS-AP Australian Academic and Rese 4538 129 4191 70 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 4621 55 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 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 668 191 608 164 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 680 294 1884 255 DFN Verein zur Foerderung eines Deutschen 786 209 1682 191 JANET Jisc Services Limited, GB 559 117 533 106 SWITCH Switch, Swiss Academic and Researc 2614 87 26 63 ROEDUNET, RO 137 83 677 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 69 623 63 FR-RENATER Reseau National de telecommuni 200521 57 4 27 SEAP-AGE, ES 31638 50 3 22 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 10906 1 0 1 Nucleo de Inf. e Coord. do Ponto BR - NIC 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 46 8 1 MAREN, MW 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 37182 5 8 1 TERNET, TZ 327798 4 0 3 BERNET, BI 37532 2 20 2 ZAMREN, ZM 36914 1 0 1 KENET-AS, KE 36944 1 1 1 UBUNTU-UNICAST-AS, MW 37010 1 0 1 National-University-Rwanda, RW 37496 1 0 1 Aga-Khan-University, TZ 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 462 209 20 CSTNET-AS-AP Computer Network Information 680 294 1884 255 DFN Verein zur Foerderung eines Deutschen 786 209 1682 191 JANET Jisc Services Limited, GB 668 191 608 164 DNIC-AS-00668 - United States Department 58647 185 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 115 AARNET-AS-AP Australian Academic and Rese 4538 129 4191 70 ERX-CERNET-BKB China Education and Resear 559 117 533 106 SWITCH Switch, Swiss Academic and Researc 2614 87 26 63 ROEDUNET, RO 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, Thailand, 4538 129 59 ERX-CERNET-BKB China Education and Research Net 7575 169 54 AARNET-AS-AP Australian Academic and Research N 38280 50 48 MONASHUNI-MY-AS-AP Monash University Sunway Cam 4621 55 47 UNINET-AS-AP UNINET-, TH 37215 46 45 MAREN, MW 9903 46 43 RIT-AS-AP Rajamangala Institute of Technology, 680 294 39 DFN Verein zur Foerderung eines Deutschen Forsc 200521 57 30 SEAP-AGE, ES 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 /13:12 /14:21 /15:81 /16:780 /17:106 /18:90 /19:143 /20:218 /21:295 /22:492 /23:548 /24:2993 /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, IT 37215 40 46 MAREN, MW 200521 33 57 SEAP-AGE, ES 60187 26 47 LGFL-AS, GB 2614 18 87 ROEDUNET, RO 3233 18 30 ICI-ROTLD National Institute for Research and Development in Informatics - ICI Bucharest, RO 47623 18 22 IIAP-ASNET-AS, AM 20545 16 18 GRENA-AS Tbilisi, Georgia, GE 28949 16 17 TUSNET-AS 8, Kliment Ohridski St., BG 5408 13 38 GR-NET www.grnet.gr, 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 23:1 24:1 31:2 37:26 41:52 42:5 44:5 45:13 46:5 49:8 59:16 60:6 62:5 66:1 69:1 74:4 77:4 78:3 79:6 80:8 81:29 82:3 83:7 84:6 85:26 86:1 89:15 91:27 92:1 93:16 94:2 95:2 101:2 102:1 103:187 104:1 109:2 111:3 118:33 119:36 121:1 122:8 124:42 128:2 129:13 130:10 131:13 133:147 134:7 137:4 138:10 140:1 143:8 145:11 146:1 147:6 148:7 150:10 151:2 152:3 153:15 154:14 155:3 156:11 159:98 160:3 161:10 163:10 165:3 180:2 182:3 185:43 188:21 192:569 193:238 194:88 195:48 196:1 197:1 198:20 199:35 200:2 202:356 203:292 204:7 205:7 206:4 207:2 210:93 212:42 213:8 214:8 216:1 217:23 219:3 222:1 223:5 End of report