IPv4 R&E Routing Table Report 22:20 GMT Sat 16 Sep, 2023 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: 18595 Prefixes after maximum aggregation (per Origin AS): 10773 Deaggregation factor: 1.73 Unique aggregates announced (without unneeded subnets): 11967 Number of IPv4 prefixes with a valid ROA: 5205 Number of IPv4 prefixes with an invalid ROA: 35 Number of IPv4 prefixes with no ROA: 13355 Total ASes present in the Internet Routing Table: 2770 Prefixes per ASN: 6.71 Origin-only ASes present in the Internet Routing Table: 2392 Origin ASes announcing only one prefix: 1054 Transit ASes present in the Internet Routing Table: 378 Transit-only ASes present in the Internet Routing Table: 73 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.7 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 3 Number of instances of unregistered ASNs: 3 Number of 32-bit ASNs allocated by the RIRs: 42627 Number of 32-bit ASNs visible in the Routing Table: 636 Prefixes from 32-bit ASNs in the Routing Table: 1927 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: 176276736 Equivalent to 10 /8s, 129 /16s and 197 /24s Percentage of available address space announced: 4.8 Percentage of allocated address space announced: 4.8 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.5 Total number of prefixes smaller than registry allocations: 2100 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4350 Total APNIC prefixes after maximum aggregation: 2231 APNIC Deaggregation factor: 1.95 Prefixes being announced from the APNIC address blocks: 4357 Unique aggregates announced from the APNIC address blocks: 2596 APNIC Region origin ASes present in the Internet Routing Table: 526 APNIC Prefixes per ASN: 8.28 APNIC Region origin ASes announcing only one prefix: 219 APNIC Region transit ASes present in the Internet Routing Table: 57 Average APNIC Region AS path length visible: 4.0 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 201 Number of APNIC addresses announced to Internet: 35752704 Equivalent to 2 /8s, 33 /16s and 139 /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: 8265 Total ARIN prefixes after maximum aggregation: 5004 ARIN Deaggregation factor: 1.65 Prefixes being announced from the ARIN address blocks: 8257 Unique aggregates announced from the ARIN address blocks: 5551 ARIN Region origin ASes present in the Internet Routing Table: 1286 ARIN Prefixes per ASN: 6.42 ARIN Region origin ASes announcing only one prefix: 457 ARIN Region transit ASes present in the Internet Routing Table: 164 Average ARIN Region AS path length visible: 3.6 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 207 Number of ARIN addresses announced to Internet: 79422208 Equivalent to 4 /8s, 187 /16s and 227 /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, 393216-401308 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, 47/8, 48/8, 50/8, 52/8, 53/8, 54/8, 55/8, 56/8, 57/8, 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: 3522 Total RIPE prefixes after maximum aggregation: 2819 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3527 Unique aggregates announced from the RIPE address blocks: 2892 RIPE Region origin ASes present in the Internet Routing Table: 678 RIPE Prefixes per ASN: 5.20 RIPE Region origin ASes announcing only one prefix: 298 RIPE Region transit ASes present in the Internet Routing Table: 104 Average RIPE Region AS path length visible: 3.7 Max RIPE Region AS path length visible: 12 Number of RIPE region 32-bit ASNs visible in the Routing Table: 141 Number of RIPE addresses announced to Internet: 54350848 Equivalent to 3 /8s, 61 /16s and 84 /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, 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: 1420 Total LACNIC prefixes after maximum aggregation: 552 LACNIC Deaggregation factor: 2.57 Prefixes being announced from the LACNIC address blocks: 1417 Unique aggregates announced from the LACNIC address blocks: 731 LACNIC Region origin ASes present in the Internet Routing Table: 157 LACNIC Prefixes per ASN: 9.03 LACNIC Region origin ASes announcing only one prefix: 55 LACNIC Region transit ASes present in the Internet Routing Table: 25 Average LACNIC Region AS path length visible: 4.4 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61 Number of LACNIC addresses announced to Internet: 4097024 Equivalent to 0 /8s, 62 /16s and 132 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-273820 + 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: 1035 Total AfriNIC prefixes after maximum aggregation: 164 AfriNIC Deaggregation factor: 6.31 Prefixes being announced from the AfriNIC address blocks: 1035 Unique aggregates announced from the AfriNIC address blocks: 195 AfriNIC Region origin ASes present in the Internet Routing Table: 48 AfriNIC Prefixes per ASN: 21.56 AfriNIC Region origin ASes announcing only one prefix: 25 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 3.3 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 26 Number of AfriNIC addresses announced to Internet: 2588160 Equivalent to 0 /8s, 39 /16s and 126 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 45/8, 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 591 2162 464 SINET-AS Research Organization of Infor 7497 435 180 23 CSTNET-AS-AP Computer Network Informati 1237 188 74 139 KREONET-AS-KR KISTI, KR 7575 177 329 120 AARNET-AS-AP Australian Academic and Re 55824 127 19 17 NKN-CORE-NW NKN Core Network, IN 4538 112 2368 69 ERX-CERNET-BKB China Education and Rese 4621 69 37 10 UNINET-AS-AP UNINET-, TH 9411 66 16 2 NONTRINET-AS-AP Kasetsart University, T 4762 63 4 1 MAHIDOL-BORDER-AS Mahidol University, T 23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR 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 668 203 651 172 DNIC-AS-00668, US 376 201 178 150 RISQ-AS, CA 5786 196 16 1 UPRENET, PR 2152 142 507 94 CSUNET-NW, US 18558 141 18 4 NETBLK-RCOEK, US 81 126 473 31 NCREN, US 270 115 329 84 AS270, US 23024 113 7 17 OCDE, US 2920 106 34 7 LACOE, US 16509 96 11 80 AMAZON-02, 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 680 283 1903 249 DFN Verein zur Foerderung eines Deutsch 786 185 1767 182 JANET Jisc Services Limited, GB 8895 136 24 4 ISU Internet Services Unit ISU, SA 559 113 533 105 SWITCH Peering requests: peering@switch 2614 94 27 74 ROEDUNET, RO 1103 93 1246 82 SURFNET-NL SURFnet, The Netherlands, NL 137 82 677 77 ASGARR Consortium GARR, IT 553 74 465 74 BELWUE BelWue-Koordination, DE 1930 65 81 60 RCCN Fundacao para a Ciencia e a Tecnol 2200 64 599 59 FR-RENATER Reseau National de telecommu 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 219 172 43 Rede Nacional de Ensino e Pesquisa, BR 28391 152 10 66 Universidad Juarez Autonoma de Tabasco, 11340 99 24 51 Red Universitaria Nacional, CL 271640 72 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 58 102 38 Fundacao Carlos Chagas Filho de Amparo 4270 48 16 1 Red de Interconexion Universitaria, AR 19611 48 17 2 Associacao Antonio Vieira - Unisinos, B 61468 43 3 14 CEDIA, EC 28614 38 2 2 Fundacao Universidade Regional de Blume 3596 34 4 3 Universidad Autonoma Metropolitana, MX 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 2018 382 319 71 TENET-1, ZA 36914 252 82 3 KENET-AS, KE 327687 164 28 3 RENU, UG 8094 47 48 18 PUKNET, ZA 327700 42 16 1 MoRENet, MZ 3208 32 2 1 ARN, DZ 37074 14 8 2 UG-AS, GH 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA 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 591 2162 464 SINET-AS Research Organization of Infor 7497 435 180 23 CSTNET-AS-AP Computer Network Informati 2018 382 319 71 TENET-1, ZA 680 283 1903 249 DFN Verein zur Foerderung eines Deutsch 36914 252 82 3 KENET-AS, KE 1916 219 172 43 Rede Nacional de Ensino e Pesquisa, BR 668 203 651 172 DNIC-AS-00668, US 376 201 178 150 RISQ-AS, CA 5786 196 16 1 UPRENET, PR 1237 188 74 139 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 7497 435 412 CSTNET-AS-AP Computer Network Information Cente 2018 382 311 TENET-1, ZA 36914 252 249 KENET-AS, KE 5786 196 195 UPRENET, PR 1916 219 176 Rede Nacional de Ensino e Pesquisa, BR 327687 164 161 RENU, UG 18558 141 137 NETBLK-RCOEK, US 8895 136 132 ISU Internet Services Unit ISU, SA 55824 127 110 NKN-CORE-NW NKN Core Network, IN 2920 106 99 LACOE, US 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 394607 UNALLOCATED 104.249.65.0/24 23024 OCDE, US 33008 UNALLOCATED 162.248.66.0/24 11096 FLORIDANET, US 394607 UNALLOCATED 216.100.93.0/24 23024 OCDE, US Complete listing at https://bgp.nsrc.org/REN/ESnet/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 134.208.0.0/16 Origin: 17711 NDHU-TW National Dong Hwa University, TW 134.208.0.0/16 Transit: 7539 TWAREN-TW National Center for High-perfo 202.58.231.0/24 Origin: 134096 EHEALTHNSW-AS-AP eHealth NSW, AU 202.58.231.0/24 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 /14:35 /15:122 /16:2016 /17:401 /18:399 /19:562 /20:874 /21:863 /22:1488 /23:1554 /24:10281 /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 241 252 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 23024 52 113 OCDE, US 32440 37 59 LONI, US 327700 37 42 MoRENet, MZ 200521 33 56 SEAP-AGE, ES 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, US Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 5:18 6:4 8:5 12:1 13:3 14:89 18:44 23:12 24:3 31:7 35:4 38:11 40:1 41:117 42:10 44:6 45:45 46:5 47:1 49:9 50:9 52:2 54:1 58:1 59:19 60:4 61:3 62:10 63:37 64:55 65:13 66:56 67:46 68:19 69:20 70:2 71:3 72:8 74:44 76:41 77:9 78:3 79:10 80:12 81:27 82:6 83:6 84:8 85:41 86:7 87:1 89:10 91:43 92:2 93:4 94:4 95:2 96:5 97:3 98:2 99:2 101:2 102:29 103:256 104:77 108:10 109:6 111:16 114:23 116:6 117:61 118:32 119:18 121:27 122:8 123:8 124:40 125:4 128:87 129:48 130:94 131:64 132:60 133:21 134:107 136:195 137:127 138:9 139:5 140:42 141:1 142:39 143:19 144:28 145:3 146:128 147:64 148:193 149:12 150:44 151:19 152:146 153:14 154:31 155:63 156:66 157:18 158:36 159:116 160:33 161:26 162:33 163:72 164:10 165:46 166:3 167:10 168:123 169:7 170:87 171:1 172:5 173:7 174:1 175:26 177:5 179:8 180:15 182:1 184:7 185:53 186:3 187:19 188:13 189:3 190:19 191:13 192:1478 193:291 194:126 195:53 196:203 197:165 198:520 199:284 200:336 201:39 202:593 203:427 204:361 205:130 206:194 207:175 208:74 209:123 210:182 211:13 212:169 213:5 214:8 216:103 217:11 218:22 219:5 220:16 222:2 223:4 End of report