IPv4 R&E Routing Table Report 20:30 GMT Tue 28 Oct, 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: 4343 Prefixes after maximum aggregation (per Origin AS): 2872 Deaggregation factor: 1.51 Unique aggregates announced (without unneeded subnets): 2859 Number of IPv4 prefixes with a valid ROA: 2538 Number of IPv4 prefixes with an invalid ROA: 11 Number of IPv4 prefixes with no ROA: 1794 Total ASes present in the Internet Routing Table: 751 Prefixes per ASN: 5.78 Origin-only ASes present in the Internet Routing Table: 634 Origin ASes announcing only one prefix: 323 Transit ASes present in the Internet Routing Table: 117 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: 5.6 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: 47817 Number of 32-bit ASNs visible in the Routing Table: 266 Prefixes from 32-bit ASNs in the Routing Table: 671 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: 62513408 Equivalent to 3 /8s, 185 /16s and 225 /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: 532 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 1474 Total APNIC prefixes after maximum aggregation: 563 APNIC Deaggregation factor: 2.62 Prefixes being announced from the APNIC address blocks: 1473 Unique aggregates announced from the APNIC address blocks: 493 APNIC Region origin ASes present in the Internet Routing Table: 213 APNIC Prefixes per ASN: 6.92 APNIC Region origin ASes announcing only one prefix: 85 APNIC Region transit ASes present in the Internet Routing Table: 18 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: 133 Number of APNIC addresses announced to Internet: 17925888 Equivalent to 1 /8s, 17 /16s and 135 /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: 9 Total ARIN prefixes after maximum aggregation: 9 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: 7 ARIN Prefixes per ASN: 2.14 ARIN Region origin ASes announcing only one prefix: 5 ARIN Region transit ASes present in the Internet Routing Table: 0 Average ARIN Region AS path length visible: 5.6 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: 71680 Equivalent to 0 /8s, 1 /16s and 24 /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: 2778 Total RIPE prefixes after maximum aggregation: 2278 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2772 Unique aggregates announced from the RIPE address blocks: 2322 RIPE Region origin ASes present in the Internet Routing Table: 489 RIPE Prefixes per ASN: 5.67 RIPE Region origin ASes announcing only one prefix: 226 RIPE Region transit ASes present in the Internet Routing Table: 88 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: 128 Number of RIPE addresses announced to Internet: 44227840 Equivalent to 2 /8s, 162 /16s and 221 /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, 262144-274844 + 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: 81 Total AfriNIC prefixes after maximum aggregation: 21 AfriNIC Deaggregation factor: 3.86 Prefixes being announced from the AfriNIC address blocks: 81 Unique aggregates announced from the AfriNIC address blocks: 27 AfriNIC Region origin ASes present in the Internet Routing Table: 13 AfriNIC Prefixes per ASN: 6.23 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 182 4192 72 ERX-CERNET-BKB China Education and Resear 55824 152 19 22 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 62 36 8 UNINET-AS-AP UNINET-, TH 2697 56 4 33 ERX-ERNET-AS Education and Research Netwo 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 24363 28 21 15 CNGI-JNN-IX-AS-AP CERNET2 IX at Shandong 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 27500 1 1 1 ICANN-MEETINGS, 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 680 281 1883 250 DFN Verein zur Foerderung eines Deutschen 786 213 1739 190 JANET Jisc Services Limited, GB 559 114 533 104 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 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 37215 43 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 680 281 1883 250 DFN Verein zur Foerderung eines Deutschen 786 213 1739 190 JANET Jisc Services Limited, GB 4538 182 4192 72 ERX-CERNET-BKB China Education and Resear 55824 152 19 22 NKN-CORE-NW NKN Core Network, IN 559 114 533 104 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 152 130 NKN-CORE-NW NKN Core Network, IN 4538 182 110 ERX-CERNET-BKB China Education and Research Net 4762 75 74 MAHIDOL-BORDER-AS Mahidol University, Thailand, 4621 62 54 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 43 42 MAREN, MW 200521 59 35 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 /16:611 /17:68 /18:59 /19:112 /20:202 /21:265 /22:365 /23:353 /24:2196 /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 37 43 MAREN, MW 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 88 ROEDUNET, RO 20545 15 17 GRENA-AS Tbilisi, Georgia, GE 5408 13 40 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) ---------------------------------------------- 5:17 14:94 31:1 37:25 41:47 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 83:5 84:5 85:28 86:1 89:15 91:32 93:13 94:2 95:2 101:3 102:1 103:195 109:1 111:3 118:33 119:8 121:11 122:8 128:2 129:7 131:6 134:3 137:4 138:1 139:1 143:2 144:22 145:12 146:1 147:3 148:7 150:2 151:2 153:11 154:14 156:1 157:3 158:24 159:1 160:4 161:6 162:1 163:2 180:15 182:3 184:1 185:33 188:19 192:411 193:229 194:87 195:47 196:8 200:1 202:302 203:126 210:10 211:1 212:43 213:4 216:1 217:23 219:1 220:3 222:3 End of report