IPv4 R&E Routing Table Report 17:15 GMT Sun 16 Mar, 2025 IPv4 BGP Table (R&E) as seen at Janet. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/Janet/ Analysis Summary ---------------- BGP routing table entries examined: 18580 Prefixes after maximum aggregation (per Origin AS): 10303 Deaggregation factor: 1.80 Unique aggregates announced (without unneeded subnets): 11389 Number of IPv4 prefixes with a valid ROA: 7383 Number of IPv4 prefixes with an invalid ROA: 3 Number of IPv4 prefixes with no ROA: 11194 Total ASes present in the Internet Routing Table: 2675 Prefixes per ASN: 6.95 Origin-only ASes present in the Internet Routing Table: 2330 Origin ASes announcing only one prefix: 1030 Transit ASes present in the Internet Routing Table: 345 Transit-only ASes present in the Internet Routing Table: 49 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.8 Max AS path length visible: 18 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 1 Number of instances of unregistered ASNs: 1 Number of 32-bit ASNs allocated by the RIRs: 46137 Number of 32-bit ASNs visible in the Routing Table: 672 Prefixes from 32-bit ASNs in the Routing Table: 1843 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: 4 Number of addresses announced to Internet: 199079424 Equivalent to 11 /8s, 221 /16s and 182 /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: 2075 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4716 Total APNIC prefixes after maximum aggregation: 2287 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4714 Unique aggregates announced from the APNIC address blocks: 2617 APNIC Region origin ASes present in the Internet Routing Table: 592 APNIC Prefixes per ASN: 7.96 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 4.7 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 238 Number of APNIC addresses announced to Internet: 45555968 Equivalent to 2 /8s, 183 /16s and 33 /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: 8027 Total ARIN prefixes after maximum aggregation: 4700 ARIN Deaggregation factor: 1.71 Prefixes being announced from the ARIN address blocks: 8043 Unique aggregates announced from the ARIN address blocks: 5218 ARIN Region origin ASes present in the Internet Routing Table: 1255 ARIN Prefixes per ASN: 6.41 ARIN Region origin ASes announcing only one prefix: 445 ARIN Region transit ASes present in the Internet Routing Table: 150 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 212 Number of ARIN addresses announced to Internet: 90484992 Equivalent to 5 /8s, 100 /16s and 177 /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: 3233 Total RIPE prefixes after maximum aggregation: 2609 RIPE Deaggregation factor: 1.24 Prefixes being announced from the RIPE address blocks: 3221 Unique aggregates announced from the RIPE address blocks: 2629 RIPE Region origin ASes present in the Internet Routing Table: 578 RIPE Prefixes per ASN: 5.57 RIPE Region origin ASes announcing only one prefix: 261 RIPE Region transit ASes present in the Internet Routing Table: 98 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: 132 Number of RIPE addresses announced to Internet: 56497664 Equivalent to 3 /8s, 94 /16s and 22 /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: 1472 Total LACNIC prefixes after maximum aggregation: 536 LACNIC Deaggregation factor: 2.75 Prefixes being announced from the LACNIC address blocks: 1468 Unique aggregates announced from the LACNIC address blocks: 701 LACNIC Region origin ASes present in the Internet Routing Table: 152 LACNIC Prefixes per ASN: 9.66 LACNIC Region origin ASes announcing only one prefix: 50 LACNIC Region transit ASes present in the Internet Routing Table: 22 Average LACNIC Region AS path length visible: 5.7 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 4125184 Equivalent to 0 /8s, 62 /16s and 242 /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: 1131 Total AfriNIC prefixes after maximum aggregation: 170 AfriNIC Deaggregation factor: 6.65 Prefixes being announced from the AfriNIC address blocks: 1130 Unique aggregates announced from the AfriNIC address blocks: 220 AfriNIC Region origin ASes present in the Internet Routing Table: 48 AfriNIC Prefixes per ASN: 23.54 AfriNIC Region origin ASes announcing only one prefix: 26 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 4.6 Max AfriNIC Region AS path length visible: 18 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 2412800 Equivalent to 0 /8s, 36 /16s and 209 /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 452 180 24 CSTNET-AS-AP Computer Network Information 1237 192 74 146 KREONET-AS-KR KISTI, KR 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 297 117 AARNET-AS-AP Australian Academic and Rese 55824 145 19 20 NKN-CORE-NW NKN Core Network, IN 4538 141 4192 70 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 4621 60 35 8 UNINET-AS-AP UNINET-, TH Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 668 202 646 172 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 2152 149 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 23024 99 7 17 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 86 542 51 MERIT-AS-14, US Complete listing at https://bgp.nsrc.org/REN/Janet/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 786 193 1747 185 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 90 26 70 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 2200 64 630 59 FR-RENATER Reseau National de telecommuni Complete listing at https://bgp.nsrc.org/REN/Janet/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 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 4270 53 16 1 Red de Interconexion Universitaria, AR 61468 52 3 21 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 46 99 35 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/Janet/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 542 82 3 KENET-AS, KE 2018 373 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 35 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 13 8 5 NRaE1-AS, NG 37501 11 49 6 UOFS, ZA 327700 10 16 1 MoRENet, MZ 36982 8 33 8 UCT, ZA 37654 8 1 5 RwEdNet-AS, RW Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 624 2170 464 SINET-AS Research Organization of Informa 36914 542 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 2018 373 318 69 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 668 202 646 172 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 786 193 1747 185 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 542 539 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 TENET-1, ZA 5786 199 198 UPRENET, PR 1916 236 195 Rede Nacional de Ensino e Pesquisa, BR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 173 166 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 145 125 NKN-CORE-NW NKN Core Network, IN 8895 108 103 ISU Internet Services Unit ISU, SA Complete listing at https://bgp.nsrc.org/REN/Janet/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 Complete listing at https://bgp.nsrc.org/REN/Janet/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 202.46.245.0/24 Origin: 147171 IDNIC-BRIN-AS-ID Badan Riset dan Inovasi 202.46.245.0/24 Transit: 64302 IDNIC-IDREN-AS-ID IDREN - Indonesia Rese 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/Janet/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 /12:10 /13:18 /14:35 /15:115 /16:1985 /17:411 /18:450 /19:566 /20:824 /21:852 /22:1351 /23:1477 /24:10483 /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 518 542 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 23024 38 99 OCDE, US 32440 33 57 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 57 SEAP-AGE, ES 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 37215 29 35 MAREN, MW Complete listing at https://bgp.nsrc.org/REN/Janet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:15 6:4 8:2 12:1 14:92 23:8 24:2 31:1 35:9 37:8 38:10 40:1 41:216 42:7 44:4 45:39 46:4 47:1 49:12 50:2 59:19 60:6 61:3 62:6 63:32 64:42 65:5 66:34 67:39 68:10 69:17 70:2 71:1 72:8 74:53 76:34 77:6 78:3 79:9 80:4 81:24 82:3 83:7 84:7 85:30 87:1 89:10 91:39 93:13 94:2 95:2 96:5 97:1 98:2 102:10 103:359 104:79 108:8 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:30 121:27 122:8 123:8 124:42 128:57 129:36 130:95 131:64 132:66 133:157 134:108 136:200 137:51 138:58 139:11 140:33 141:3 142:27 143:25 144:27 145:2 146:136 147:54 148:198 149:12 150:69 151:8 152:129 153:14 154:44 155:63 156:135 157:25 158:30 159:117 160:34 161:16 162:23 163:62 164:11 165:48 167:10 168:119 169:7 170:95 171:1 172:2 173:6 175:16 177:6 179:13 180:16 181:1 182:12 184:6 185:42 186:3 187:24 188:12 189:3 190:33 191:13 192:1415 193:257 194:104 195:75 196:147 197:332 198:465 199:277 200:332 201:36 202:631 203:433 204:372 205:136 206:211 207:224 208:62 209:118 210:223 211:3 212:144 213:4 214:8 216:91 217:12 218:2 219:6 220:16 222:3 223:15 End of report