IPv4 R&E Routing Table Report 20:00 GMT Mon 02 Jun, 2025 IPv4 BGP Table (R&E) as seen at SingAREN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/SingAREN/ Analysis Summary ---------------- BGP routing table entries examined: 19024 Prefixes after maximum aggregation (per Origin AS): 10543 Deaggregation factor: 1.80 Unique aggregates announced (without unneeded subnets): 11554 Number of IPv4 prefixes with a valid ROA: 7534 Number of IPv4 prefixes with an invalid ROA: 3 Number of IPv4 prefixes with no ROA: 11487 Total ASes present in the Internet Routing Table: 2768 Prefixes per ASN: 6.87 Origin-only ASes present in the Internet Routing Table: 2409 Origin ASes announcing only one prefix: 1063 Transit ASes present in the Internet Routing Table: 359 Transit-only ASes present in the Internet Routing Table: 58 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 20 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 46555 Number of 32-bit ASNs visible in the Routing Table: 700 Prefixes from 32-bit ASNs in the Routing Table: 1889 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: 2 Number of addresses announced to Internet: 199213312 Equivalent to 11 /8s, 223 /16s and 193 /24s Percentage of available address space announced: 5.4 Percentage of allocated address space announced: 5.4 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: 2190 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4807 Total APNIC prefixes after maximum aggregation: 2321 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4807 Unique aggregates announced from the APNIC address blocks: 2655 APNIC Region origin ASes present in the Internet Routing Table: 608 APNIC Prefixes per ASN: 7.91 APNIC Region origin ASes announcing only one prefix: 254 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 3.5 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 245 Number of APNIC addresses announced to Internet: 45582336 Equivalent to 2 /8s, 183 /16s and 136 /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: 8403 Total ARIN prefixes after maximum aggregation: 4747 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 8451 Unique aggregates announced from the ARIN address blocks: 5237 ARIN Region origin ASes present in the Internet Routing Table: 1269 ARIN Prefixes per ASN: 6.66 ARIN Region origin ASes announcing only one prefix: 444 ARIN Region transit ASes present in the Internet Routing Table: 156 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 17 Number of ARIN region 32-bit ASNs visible in the Routing Table: 217 Number of ARIN addresses announced to Internet: 89328640 Equivalent to 5 /8s, 83 /16s and 12 /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: 3603 Total RIPE prefixes after maximum aggregation: 2890 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3588 Unique aggregates announced from the RIPE address blocks: 2931 RIPE Region origin ASes present in the Internet Routing Table: 657 RIPE Prefixes per ASN: 5.46 RIPE Region origin ASes announcing only one prefix: 288 RIPE Region transit ASes present in the Internet Routing Table: 107 Average RIPE Region AS path length visible: 3.8 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 152 Number of RIPE addresses announced to Internet: 57875968 Equivalent to 3 /8s, 115 /16s and 30 /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: 1105 Total LACNIC prefixes after maximum aggregation: 404 LACNIC Deaggregation factor: 2.74 Prefixes being announced from the LACNIC address blocks: 1104 Unique aggregates announced from the LACNIC address blocks: 501 LACNIC Region origin ASes present in the Internet Routing Table: 120 LACNIC Prefixes per ASN: 9.20 LACNIC Region origin ASes announcing only one prefix: 49 LACNIC Region transit ASes present in the Internet Routing Table: 18 Average LACNIC Region AS path length visible: 5.5 Max LACNIC Region AS path length visible: 11 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 54 Number of LACNIC addresses announced to Internet: 3888384 Equivalent to 0 /8s, 59 /16s and 85 /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: 1073 Total AfriNIC prefixes after maximum aggregation: 176 AfriNIC Deaggregation factor: 6.10 Prefixes being announced from the AfriNIC address blocks: 1072 Unique aggregates announced from the AfriNIC address blocks: 228 AfriNIC Region origin ASes present in the Internet Routing Table: 54 AfriNIC Prefixes per ASN: 19.85 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 6.6 Max AfriNIC Region AS path length visible: 20 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 32 Number of AfriNIC addresses announced to Internet: 2535680 Equivalent to 0 /8s, 38 /16s and 177 /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 2907 595 2170 464 SINET-AS Research Organization of Informa 7497 456 180 24 CSTNET-AS-AP Computer Network Information 1237 194 74 146 KREONET-AS-KR KISTI, KR 4538 193 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 173 281 116 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 66 37 9 UNINET-AS-AP UNINET-, TH 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 551 507 99 CENIC-2152, US 2920 229 44 49 LACOE, US 668 205 630 173 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 18558 140 18 5 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 23024 98 7 19 OCDE, US 21976 90 34 16 NJEDGE-NET, US 237 85 542 51 MERIT-AS-14, US Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 284 1899 250 DFN Verein zur Foerderung eines Deutschen 786 194 1742 187 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 109 24 5 ISU Internet Services Unit ISU, SA 1103 97 1727 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 3267 74 28 68 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 242 178 41 Rede Nacional de Ensino e Pesquisa, BR 11340 110 25 52 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 52 100 36 Fundacao Carlos Chagas Filho de Amparo a 61468 52 3 21 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 3596 37 8 4 Universidad Autonoma Metropolitana, MX 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 466 82 3 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 36 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37501 11 49 6 UOFS, ZA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 37661 9 6 3 NRaE1-AS, NG 36982 8 33 8 UCT, ZA Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 595 2170 464 SINET-AS Research Organization of Informa 2152 551 507 99 CENIC-2152, US 36914 466 82 3 KENET-AS, KE 7497 456 180 24 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 680 284 1899 250 DFN Verein zur Foerderung eines Deutschen 1916 242 178 41 Rede Nacional de Ensino e Pesquisa, BR 2920 229 44 49 LACOE, US 668 205 630 173 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 466 463 KENET-AS, KE 2152 551 452 CENIC-2152, US 7497 456 432 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 1916 242 201 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 UPRENET, PR 2920 229 180 LACOE, US 58647 182 180 KAGAWAU-AS Kagawa University, JP 18558 140 135 NETBLK-RCOEK, US 55824 147 126 NKN-CORE-NW NKN Core Network, IN Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/SingAREN/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 /9:1 /10:1 /11:1 /12:11 /13:19 /14:33 /15:115 /16:1968 /17:418 /18:468 /19:586 /20:844 /21:864 /22:1445 /23:1601 /24:10649 /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 36914 453 466 KENET-AS, KE 8895 106 109 ISU Internet Services Unit ISU, SA 2152 65 551 CENIC-2152, US 23024 38 98 OCDE, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 3267 31 74 NIKS, RU 32440 31 56 LONI, US 200521 31 56 SEAP-AGE, ES 25977 30 44 HCCS, US Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:16 6:4 8:2 12:2 14:92 23:9 24:3 31:1 35:10 37:9 38:11 40:1 41:154 42:18 44:5 45:46 46:5 47:1 49:12 50:2 52:1 58:15 59:20 60:6 61:3 62:8 63:32 64:43 65:5 66:42 67:39 68:13 69:17 70:2 71:1 72:8 74:54 76:34 77:9 78:3 79:9 80:13 81:11 82:6 83:8 84:8 85:51 86:6 87:1 89:10 91:41 92:2 93:15 94:2 95:2 96:5 97:1 98:2 101:3 102:12 103:365 104:78 108:8 109:4 111:21 113:1 114:24 116:9 117:61 118:35 119:31 121:28 122:8 123:8 124:42 125:5 128:57 129:43 130:98 131:64 132:64 133:156 134:110 136:200 137:103 138:10 139:5 140:32 141:4 142:27 143:27 144:33 145:2 146:137 147:54 148:41 149:12 150:38 151:11 152:137 153:15 154:46 155:84 156:128 157:26 158:28 159:117 160:35 161:19 162:22 163:65 164:10 165:42 167:26 168:103 169:7 170:19 171:1 172:2 173:6 175:16 177:5 179:12 180:16 181:1 182:12 184:3 185:50 186:3 187:25 188:15 189:3 190:17 191:12 192:1412 193:299 194:145 195:82 196:149 197:335 198:532 199:280 200:298 201:37 202:634 203:417 204:397 205:177 206:203 207:311 208:66 209:165 210:210 211:4 212:147 213:4 214:10 216:94 217:22 218:23 219:7 220:16 222:4 223:17 End of report