IPv4 R&E Routing Table Report 22:35 GMT Fri 18 Apr, 2025 IPv4 BGP Table (R&E) as seen at RouteViews PacWave. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/PacWave/ Analysis Summary ---------------- BGP routing table entries examined: 32338 Prefixes after maximum aggregation (per Origin AS): 15722 Deaggregation factor: 2.06 Unique aggregates announced (without unneeded subnets): 18707 Total ASes present in the Internet Routing Table: 2887 Prefixes per ASN: 11.20 Origin-only ASes present in the Internet Routing Table: 2508 Origin ASes announcing only one prefix: 1103 Transit ASes present in the Internet Routing Table: 379 Transit-only ASes present in the Internet Routing Table: 62 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.5 Max AS path length visible: 21 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 37 Number of instances of unregistered ASNs: 37 Number of 32-bit ASNs allocated by the RIRs: 46240 Number of 32-bit ASNs visible in the Routing Table: 735 Prefixes from 32-bit ASNs in the Routing Table: 4995 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: 10 Number of addresses announced to Internet: 345644544 Equivalent to 20 /8s, 154 /16s and 30 /24s Percentage of available address space announced: 9.3 Percentage of allocated address space announced: 9.3 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: 4232 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4916 Total APNIC prefixes after maximum aggregation: 2335 APNIC Deaggregation factor: 2.11 Prefixes being announced from the APNIC address blocks: 5146 Unique aggregates announced from the APNIC address blocks: 2915 APNIC Region origin ASes present in the Internet Routing Table: 607 APNIC Prefixes per ASN: 8.48 APNIC Region origin ASes announcing only one prefix: 251 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 4.6 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 248 Number of APNIC addresses announced to Internet: 47349504 Equivalent to 2 /8s, 210 /16s and 127 /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: 21308 Total ARIN prefixes after maximum aggregation: 9773 ARIN Deaggregation factor: 2.18 Prefixes being announced from the ARIN address blocks: 20494 Unique aggregates announced from the ARIN address blocks: 11261 ARIN Region origin ASes present in the Internet Routing Table: 1367 ARIN Prefixes per ASN: 14.99 ARIN Region origin ASes announcing only one prefix: 479 ARIN Region transit ASes present in the Internet Routing Table: 171 Average ARIN Region AS path length visible: 2.9 Max ARIN Region AS path length visible: 17 Number of ARIN region 32-bit ASNs visible in the Routing Table: 243 Number of ARIN addresses announced to Internet: 209494272 Equivalent to 12 /8s, 124 /16s and 161 /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: 3662 Total RIPE prefixes after maximum aggregation: 2936 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 4259 Unique aggregates announced from the RIPE address blocks: 3601 RIPE Region origin ASes present in the Internet Routing Table: 658 RIPE Prefixes per ASN: 6.47 RIPE Region origin ASes announcing only one prefix: 285 RIPE Region transit ASes present in the Internet Routing Table: 104 Average RIPE Region AS path length visible: 4.6 Max RIPE Region AS path length visible: 15 Number of RIPE region 32-bit ASNs visible in the Routing Table: 151 Number of RIPE addresses announced to Internet: 81547520 Equivalent to 4 /8s, 220 /16s and 81 /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: 1286 Total LACNIC prefixes after maximum aggregation: 493 LACNIC Deaggregation factor: 2.61 Prefixes being announced from the LACNIC address blocks: 1293 Unique aggregates announced from the LACNIC address blocks: 685 LACNIC Region origin ASes present in the Internet Routing Table: 135 LACNIC Prefixes per ASN: 9.58 LACNIC Region origin ASes announcing only one prefix: 58 LACNIC Region transit ASes present in the Internet Routing Table: 24 Average LACNIC Region AS path length visible: 4.6 Max LACNIC Region AS path length visible: 10 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61 Number of LACNIC addresses announced to Internet: 4611840 Equivalent to 0 /8s, 70 /16s and 95 /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: 1129 Total AfriNIC prefixes after maximum aggregation: 176 AfriNIC Deaggregation factor: 6.41 Prefixes being announced from the AfriNIC address blocks: 1136 Unique aggregates announced from the AfriNIC address blocks: 235 AfriNIC Region origin ASes present in the Internet Routing Table: 54 AfriNIC Prefixes per ASN: 21.04 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: 4.6 Max AfriNIC Region AS path length visible: 21 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 32 Number of AfriNIC addresses announced to Internet: 2636800 Equivalent to 0 /8s, 40 /16s and 60 /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 624 2170 464 SINET-AS Research Organization of Informa 7497 453 180 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 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 282 117 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 67 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/PacWave/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 5103 4938 2418 AMAZON-02, US 396982 2957 3650 468 GOOGLE-CLOUD-PLATFORM, US 714 1171 4392 5 APPLE-ENGINEERING, US 14618 1042 4447 801 AMAZON-AES, US 15169 965 2012 76 GOOGLE, US 8075 755 16020 636 MICROSOFT-CORP-MSN-AS-BLOCK, US 2152 543 507 99 CENIC-2152, US 2920 222 44 49 LACOE, US 668 212 647 180 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 786 197 1750 189 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 107 24 5 ISU Internet Services Unit ISU, SA 1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 8987 91 244 66 AMAZON EXPANSION, IE 2614 89 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 3267 79 29 69 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 52 Red Universitaria Nacional, CL 271640 67 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 Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 530 82 3 KENET-AS, KE 2018 373 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 34 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/PacWave/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 5103 4938 2418 AMAZON-02, US 396982 2957 3650 468 GOOGLE-CLOUD-PLATFORM, US 714 1171 4392 5 APPLE-ENGINEERING, US 14618 1042 4447 801 AMAZON-AES, US 15169 965 2012 76 GOOGLE, US 8075 755 16020 636 MICROSOFT-CORP-MSN-AS-BLOCK, US 2907 624 2170 464 SINET-AS Research Organization of Informa 2152 543 507 99 CENIC-2152, US 36914 530 82 3 KENET-AS, KE 7497 453 180 24 CSTNET-AS-AP Computer Network Information Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 396982 2957 2489 GOOGLE-CLOUD-PLATFORM, US 714 1171 1166 APPLE-ENGINEERING, US 15169 965 889 GOOGLE, US 36914 530 527 KENET-AS, KE 2152 543 444 CENIC-2152, US 7497 453 429 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 TENET-1, ZA 14618 1042 241 AMAZON-AES, US 5786 198 197 UPRENET, PR 1916 236 195 Rede Nacional de Ensino e Pesquisa, BR Complete listing at https://bgp.nsrc.org/REN/PacWave/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 65208 PRIVATE 63.225.1.0/24 11570 AS11570, US 36288 UNALLOCATED 64.79.154.0/24 293 ESNET, US 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 65208 PRIVATE 206.206.156.0/22 11570 AS11570, US Complete listing at https://bgp.nsrc.org/REN/PacWave/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 64.186.3.0/24 Origin: 16509 AMAZON-02, US 64.186.3.0/24 Transit: 101 WASH-NSF-AS, US 103.165.160.0/24 Origin: 16509 AMAZON-02, US 103.165.160.0/24 Transit: 101 WASH-NSF-AS, US 103.177.50.0/23 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US 103.177.50.0/23 Transit: 15169 GOOGLE, US 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 192.225.212.0/24 Origin: 14618 AMAZON-AES, US 192.225.212.0/24 Transit: 16509 AMAZON-02, US Complete listing at https://bgp.nsrc.org/REN/PacWave/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 /8:1 /9:3 /10:3 /11:11 /12:38 /13:53 /14:117 /15:234 /16:2425 /17:617 /18:607 /19:887 /20:3039 /21:1554 /22:2269 /23:2493 /24:17987 /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 16509 838 5103 AMAZON-02, US 36914 506 530 KENET-AS, KE 14618 326 1042 AMAZON-AES, US 396982 276 2957 GOOGLE-CLOUD-PLATFORM, US 15169 272 965 GOOGLE, US 8075 140 755 MICROSOFT-CORP-MSN-AS-BLOCK, US 8895 104 107 ISU Internet Services Unit ISU, SA 2152 63 543 CENIC-2152, US 23024 38 99 OCDE, US 3267 35 79 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/PacWave/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 2:2 3:280 4:2 5:27 6:4 8:28 12:2 13:155 14:93 15:138 16:132 17:314 18:328 20:14 23:132 24:3 31:6 34:24 35:99 36:1 37:11 38:12 40:6 41:215 42:18 43:2 44:4 45:91 46:13 47:1 49:8 50:13 52:850 54:178 57:14 58:16 59:20 60:6 61:3 62:16 63:46 64:183 65:44 66:124 67:77 68:25 69:72 70:31 71:26 72:22 74:164 75:1 76:43 77:12 78:3 79:10 80:14 81:25 82:7 83:9 84:9 85:58 86:6 87:6 88:1 89:23 91:57 92:9 93:46 94:8 95:2 96:7 97:2 98:15 99:74 101:4 102:15 103:435 104:275 107:42 108:170 109:9 111:22 113:5 114:32 115:1 116:14 117:67 118:34 119:30 121:29 122:11 123:8 124:42 125:5 128:58 129:47 130:170 131:80 132:68 133:157 134:112 135:10 136:313 137:124 138:23 139:27 140:49 141:18 142:334 143:42 144:70 145:9 146:141 147:82 148:212 149:18 150:77 151:54 152:153 153:15 154:45 155:134 156:133 157:41 158:42 159:174 160:40 161:55 162:114 163:79 164:31 165:80 166:5 167:43 168:170 169:15 170:147 171:1 172:136 173:127 174:2 175:16 176:6 177:5 178:3 179:13 180:16 181:1 182:12 184:9 185:152 186:3 187:26 188:20 189:3 190:17 191:13 192:1729 193:336 194:142 195:82 196:148 197:323 198:643 199:412 200:298 201:39 202:662 203:471 204:467 205:219 206:258 207:359 208:177 209:281 210:225 211:4 212:136 213:23 214:10 216:263 217:27 218:23 219:6 220:17 222:4 223:16 End of report