IPv4 R&E Routing Table Report 22:20 GMT Fri 22 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: 18572 Prefixes after maximum aggregation (per Origin AS): 10690 Deaggregation factor: 1.74 Unique aggregates announced (without unneeded subnets): 11876 Number of IPv4 prefixes with a valid ROA: 5027 Number of IPv4 prefixes with an invalid ROA: 23 Number of IPv4 prefixes with no ROA: 13522 Total ASes present in the Internet Routing Table: 2733 Prefixes per ASN: 6.80 Origin-only ASes present in the Internet Routing Table: 2359 Origin ASes announcing only one prefix: 1045 Transit ASes present in the Internet Routing Table: 374 Transit-only ASes present in the Internet Routing Table: 72 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: 42660 Number of 32-bit ASNs visible in the Routing Table: 623 Prefixes from 32-bit ASNs in the Routing Table: 1891 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: 176107008 Equivalent to 10 /8s, 127 /16s and 46 /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: 2091 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4520 Total APNIC prefixes after maximum aggregation: 2229 APNIC Deaggregation factor: 2.03 Prefixes being announced from the APNIC address blocks: 4528 Unique aggregates announced from the APNIC address blocks: 2595 APNIC Region origin ASes present in the Internet Routing Table: 525 APNIC Prefixes per ASN: 8.62 APNIC Region origin ASes announcing only one prefix: 220 APNIC Region transit ASes present in the Internet Routing Table: 56 Average APNIC Region AS path length visible: 3.9 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 200 Number of APNIC addresses announced to Internet: 35822080 Equivalent to 2 /8s, 34 /16s and 154 /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: 8250 Total ARIN prefixes after maximum aggregation: 4992 ARIN Deaggregation factor: 1.65 Prefixes being announced from the ARIN address blocks: 8244 Unique aggregates announced from the ARIN address blocks: 5533 ARIN Region origin ASes present in the Internet Routing Table: 1283 ARIN Prefixes per ASN: 6.43 ARIN Region origin ASes announcing only one prefix: 455 ARIN Region transit ASes present in the Internet Routing Table: 163 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: 206 Number of ARIN addresses announced to Internet: 79303936 Equivalent to 4 /8s, 186 /16s and 21 /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: 3523 Total RIPE prefixes after maximum aggregation: 2826 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3525 Unique aggregates announced from the RIPE address blocks: 2879 RIPE Region origin ASes present in the Internet Routing Table: 677 RIPE Prefixes per ASN: 5.21 RIPE Region origin ASes announcing only one prefix: 296 RIPE Region transit ASes present in the Internet Routing Table: 105 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: 54405376 Equivalent to 3 /8s, 62 /16s and 41 /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: 1237 Total LACNIC prefixes after maximum aggregation: 477 LACNIC Deaggregation factor: 2.59 Prefixes being announced from the LACNIC address blocks: 1234 Unique aggregates announced from the LACNIC address blocks: 673 LACNIC Region origin ASes present in the Internet Routing Table: 127 LACNIC Prefixes per ASN: 9.72 LACNIC Region origin ASes announcing only one prefix: 49 LACNIC Region transit ASes present in the Internet Routing Table: 23 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: 51 Number of LACNIC addresses announced to Internet: 3921920 Equivalent to 0 /8s, 59 /16s and 216 /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: 1039 Total AfriNIC prefixes after maximum aggregation: 163 AfriNIC Deaggregation factor: 6.37 Prefixes being announced from the AfriNIC address blocks: 1039 Unique aggregates announced from the AfriNIC address blocks: 194 AfriNIC Region origin ASes present in the Internet Routing Table: 47 AfriNIC Prefixes per ASN: 22.11 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: 25 Number of AfriNIC addresses announced to Internet: 2587904 Equivalent to 0 /8s, 39 /16s and 125 /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 594 2163 466 SINET-AS Research Organization of Infor 7497 437 180 23 CSTNET-AS-AP Computer Network Informati 1237 188 74 139 KREONET-AS-KR KISTI, KR 58647 177 18 2 KAGAWAU-AS Kagawa University, JP 7575 176 329 120 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 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 376 201 178 150 RISQ-AS, CA 5786 197 16 1 UPRENET, PR 668 196 641 168 DNIC-AS-00668, US 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 104 34 7 LACOE, US 21976 82 51 18 NJEDGE-NET, 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 213 176 42 Rede Nacional de Ensino e Pesquisa, BR 28391 152 10 66 Universidad Juarez Autonoma de Tabasco, 11340 104 24 48 Red Universitaria Nacional, CL 271640 72 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 58 102 38 Fundacao Carlos Chagas Filho de Amparo 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 1251 31 32 25 FUNDACAO DE AMPARO A PESQUISA DO ESTADO 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 383 319 71 TENET-1, ZA 36914 258 82 3 KENET-AS, KE 327687 166 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 594 2163 466 SINET-AS Research Organization of Infor 7497 437 180 23 CSTNET-AS-AP Computer Network Informati 2018 383 319 71 TENET-1, ZA 680 283 1903 249 DFN Verein zur Foerderung eines Deutsch 36914 258 82 3 KENET-AS, KE 1916 213 176 42 Rede Nacional de Ensino e Pesquisa, BR 376 201 178 150 RISQ-AS, CA 5786 197 16 1 UPRENET, PR 668 196 641 168 DNIC-AS-00668, US 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 437 414 CSTNET-AS-AP Computer Network Information Cente 2018 383 312 TENET-1, ZA 36914 258 255 KENET-AS, KE 5786 197 196 UPRENET, PR 58647 177 175 KAGAWAU-AS Kagawa University, JP 1916 213 171 Rede Nacional de Ensino e Pesquisa, BR 327687 166 163 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 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 /18:397 /19:562 /20:866 /21:832 /22:1467 /23:1553 /24:10321 /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 247 258 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 23024 52 113 OCDE, US 32440 37 59 LONI, US 327700 36 42 MoRENet, MZ 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 31 54 SEAP-AGE, ES 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 14:87 18:43 23:12 24:3 31:7 35:4 38:11 40:1 41:117 42:10 44:6 45:43 46:5 47:1 49:9 50:9 52:1 58:1 59:19 60:5 61:3 62:9 63:37 64:55 65:13 66:56 67:46 68:19 69:20 70:2 71:1 72:8 74:47 76:41 77:9 78:3 79:10 80:12 81:27 82:6 83:6 84:7 85:41 86:7 87:1 89:10 91:43 92:2 93:4 94:4 95:2 96:5 97:3 98:2 101:2 102:29 103:255 104:77 108:10 109:6 111:16 114:23 116:6 117:61 118:32 119:18 121:27 122:8 123:8 124:40 125:4 128:87 129:48 130:94 131:64 132:60 133:152 134:107 136:196 137:130 138:9 139:5 140:42 141:1 142:39 143:19 144:28 145:3 146:131 147:64 148:193 149:12 150:44 151:19 152:146 153:14 154:31 155:63 156:64 157:18 158:36 159:116 160:33 161:26 162:33 163:71 164:10 165:46 166:3 167:10 168:106 169:8 170:30 171:1 172:5 173:7 174:1 175:27 177:5 179:8 180:15 182:1 184:8 185:49 186:3 187:19 188:13 189:3 190:18 191:13 192:1487 193:291 194:126 195:53 196:199 197:170 198:519 199:287 200:287 201:39 202:615 203:426 204:372 205:130 206:195 207:175 208:76 209:123 210:183 211:13 212:168 213:5 214:8 216:100 217:10 218:22 219:5 220:16 222:2 223:4 End of report