IPv4 R&E Routing Table Report 22:20 GMT Sat 11 Jan, 2025 IPv4 BGP Table (R&E) as seen at ESnet. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/ESnet/ Analysis Summary ---------------- BGP routing table entries examined: 19157 Prefixes after maximum aggregation (per Origin AS): 10456 Deaggregation factor: 1.83 Unique aggregates announced (without unneeded subnets): 11612 Number of IPv4 prefixes with a valid ROA: 7469 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 11686 Total ASes present in the Internet Routing Table: 2785 Prefixes per ASN: 6.88 Origin-only ASes present in the Internet Routing Table: 2410 Origin ASes announcing only one prefix: 1085 Transit ASes present in the Internet Routing Table: 375 Transit-only ASes present in the Internet Routing Table: 71 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.8 Max AS path length visible: 24 Max AS path prepend of ASN (138136) 20 Prefixes from unregistered ASNs in the Routing Table: 2 Number of instances of unregistered ASNs: 2 Number of 32-bit ASNs allocated by the RIRs: 46023 Number of 32-bit ASNs visible in the Routing Table: 684 Prefixes from 32-bit ASNs in the Routing Table: 1856 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: 3 Number of addresses announced to Internet: 168983040 Equivalent to 10 /8s, 18 /16s and 122 /24s Percentage of available address space announced: 4.6 Percentage of allocated address space announced: 4.6 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: 2323 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4609 Total APNIC prefixes after maximum aggregation: 2228 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4609 Unique aggregates announced from the APNIC address blocks: 2618 APNIC Region origin ASes present in the Internet Routing Table: 554 APNIC Prefixes per ASN: 8.32 APNIC Region origin ASes announcing only one prefix: 238 APNIC Region transit ASes present in the Internet Routing Table: 57 Average APNIC Region AS path length visible: 3.6 Max APNIC Region AS path length visible: 24 Number of APNIC region 32-bit ASNs visible in the Routing Table: 206 Number of APNIC addresses announced to Internet: 35811328 Equivalent to 2 /8s, 34 /16s and 112 /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, 131072-153913 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: 8530 Total ARIN prefixes after maximum aggregation: 4703 ARIN Deaggregation factor: 1.81 Prefixes being announced from the ARIN address blocks: 8543 Unique aggregates announced from the ARIN address blocks: 5177 ARIN Region origin ASes present in the Internet Routing Table: 1291 ARIN Prefixes per ASN: 6.62 ARIN Region origin ASes announcing only one prefix: 459 ARIN Region transit ASes present in the Internet Routing Table: 155 Average ARIN Region AS path length visible: 3.8 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 227 Number of ARIN addresses announced to Internet: 72942080 Equivalent to 4 /8s, 89 /16s and 2 /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: 3515 Total RIPE prefixes after maximum aggregation: 2827 RIPE Deaggregation factor: 1.24 Prefixes being announced from the RIPE address blocks: 3506 Unique aggregates announced from the RIPE address blocks: 2905 RIPE Region origin ASes present in the Internet Routing Table: 669 RIPE Prefixes per ASN: 5.24 RIPE Region origin ASes announcing only one prefix: 306 RIPE Region transit ASes present in the Internet Routing Table: 109 Average RIPE Region AS path length visible: 3.7 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 158 Number of RIPE addresses announced to Internet: 53731072 Equivalent to 3 /8s, 51 /16s and 223 /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: 1371 Total LACNIC prefixes after maximum aggregation: 522 LACNIC Deaggregation factor: 2.63 Prefixes being announced from the LACNIC address blocks: 1367 Unique aggregates announced from the LACNIC address blocks: 690 LACNIC Region origin ASes present in the Internet Routing Table: 149 LACNIC Prefixes per ASN: 9.17 LACNIC Region origin ASes announcing only one prefix: 52 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64 Number of LACNIC addresses announced to Internet: 4120832 Equivalent to 0 /8s, 62 /16s and 225 /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: 1130 Total AfriNIC prefixes after maximum aggregation: 174 AfriNIC Deaggregation factor: 6.49 Prefixes being announced from the AfriNIC address blocks: 1129 Unique aggregates announced from the AfriNIC address blocks: 219 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 23.04 AfriNIC Region origin ASes announcing only one prefix: 30 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 3.4 Max AfriNIC Region AS path length visible: 19 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 29 Number of AfriNIC addresses announced to Internet: 2375168 Equivalent to 0 /8s, 36 /16s and 62 /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 626 2202 463 SINET-AS Research Organization of Informa 7497 451 212 25 CSTNET-AS-AP Computer Network Information 1237 190 74 144 KREONET-AS-KR KISTI, KR 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 313 113 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4538 121 2384 69 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 69 37 10 UNINET-AS-AP UNINET-, TH 2697 59 4 34 ERX-ERNET-AS Education and Research Netwo Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 525 507 99 CENIC-2152, US 2920 226 44 49 LACOE, US 376 201 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 18558 140 18 5 NETBLK-RCOEK, US 81 128 471 35 NCREN, US 23024 97 7 19 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 84 541 50 MERIT-AS-14, US 1736 79 16 1 MU-AS, US Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 786 185 1767 182 JANET Jisc Services Limited, GB 8895 129 24 5 ISU Internet Services Unit ISU, SA 559 114 533 104 SWITCH Peering requests: peering@switch.c 1103 94 1231 81 SURFNET-NL SURFnet, The Netherlands, NL 2614 93 26 73 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 78 462 78 BELWUE BelWue-Koordination, DE 3267 76 26 66 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 158 178 41 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 109 25 52 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 61468 52 5 17 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 4270 46 16 1 Red de Interconexion Universitaria, AR 2715 44 99 33 Fundacao Carlos Chagas Filho de Amparo a 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 537 82 3 KENET-AS, KE 2018 380 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 32 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 8 4 NRaE1-AS, NG 327700 12 16 1 MoRENet, MZ 37501 11 49 6 UOFS, ZA 36982 8 33 8 UCT, ZA 37182 7 0 7 TERNET, TZ Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 626 2202 463 SINET-AS Research Organization of Informa 36914 537 82 3 KENET-AS, KE 2152 525 507 99 CENIC-2152, US 7497 451 212 25 CSTNET-AS-AP Computer Network Information 2018 380 319 71 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 2920 226 44 49 LACOE, US 376 201 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 1237 190 74 144 KREONET-AS-KR KISTI, KR Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 537 534 KENET-AS, KE 2152 525 426 CENIC-2152, US 7497 451 426 CSTNET-AS-AP Computer Network Information Cente 2018 380 309 TENET-1, ZA 5786 198 197 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 226 177 LACOE, US 18558 140 135 NETBLK-RCOEK, US 55824 146 126 NKN-CORE-NW NKN Core Network, IN 8895 129 124 ISU Internet Services Unit ISU, SA Complete listing at https://bgp.nsrc.org/REN/ESnet/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 22272 UNALLOCATED 206.208.24.0/21 6325 ILLINOIS-CENTURY, US Complete listing at https://bgp.nsrc.org/REN/ESnet/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 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 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/ESnet/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 /12:0 /13:0 /14:33 /15:118 /16:1932 /17:423 /18:450 /19:577 /20:864 /21:864 /22:1476 /23:1606 /24:10814 /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 513 537 KENET-AS, KE 8895 124 129 ISU Internet Services Unit ISU, SA 2152 62 525 CENIC-2152, US 23024 37 97 OCDE, US 3267 34 76 NIKS, RU 32440 33 58 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 55 SEAP-AGE, ES 25977 30 44 HCCS, US Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:15 8:5 12:2 14:93 18:43 23:11 24:3 31:1 35:9 37:8 38:13 41:222 42:11 44:4 45:46 46:4 47:1 49:11 50:4 52:1 59:19 60:6 61:3 62:7 63:37 64:46 65:18 66:52 67:43 68:20 69:18 70:2 71:1 72:7 74:54 76:38 77:10 78:3 79:10 80:12 81:25 82:7 83:7 84:4 85:45 86:2 87:1 89:11 91:42 92:2 93:13 94:2 95:2 96:5 97:1 98:2 101:1 102:11 103:292 104:77 107:2 108:8 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:23 121:27 122:8 123:8 124:42 125:5 128:56 129:37 130:98 131:64 132:64 133:155 134:105 136:198 137:98 138:58 139:5 140:31 141:3 142:40 143:25 144:29 145:2 146:136 147:61 148:199 149:13 150:70 151:11 152:127 153:14 154:41 155:59 156:131 157:24 158:30 159:117 160:31 161:18 162:31 163:58 164:10 165:50 166:2 167:26 168:118 169:7 170:94 171:1 172:2 173:7 174:1 175:16 177:6 179:12 180:16 181:1 182:11 184:1 185:51 186:3 187:21 188:14 189:3 190:34 191:13 192:1388 193:262 194:112 195:71 196:146 197:325 198:528 199:252 200:261 201:36 202:640 203:431 204:401 205:175 206:212 207:308 208:65 209:160 210:218 211:3 212:163 213:6 216:92 217:9 218:22 219:6 220:16 222:2 223:4 End of report