IPv4 R&E Routing Table Report 22:05 GMT Sat 23 Sep, 2023 IPv4 BGP Table (R&E) as seen at CENIC. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/CENIC/ Analysis Summary ---------------- BGP routing table entries examined: 24570 Prefixes after maximum aggregation (per Origin AS): 13734 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 16296 Number of IPv4 prefixes with a valid ROA: 10818 Number of IPv4 prefixes with an invalid ROA: 15 Number of IPv4 prefixes with no ROA: 13737 Total ASes present in the Internet Routing Table: 2793 Prefixes per ASN: 8.80 Origin-only ASes present in the Internet Routing Table: 2402 Origin ASes announcing only one prefix: 1062 Transit ASes present in the Internet Routing Table: 391 Transit-only ASes present in the Internet Routing Table: 76 Paths with bogon ASNs present in the IPv4 Routing Table: 2 Average AS path length visible in the Internet Routing Table: 3.9 Max AS path length visible: 14 Max AS path prepend of ASN ( 10497) 11 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: 42674 Number of 32-bit ASNs visible in the Routing Table: 635 Prefixes from 32-bit ASNs in the Routing Table: 1939 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: 8 Number of addresses announced to Internet: 296566784 Equivalent to 17 /8s, 173 /16s and 64 /24s Percentage of available address space announced: 8.0 Percentage of allocated address space announced: 8.0 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: 3143 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4664 Total APNIC prefixes after maximum aggregation: 2296 APNIC Deaggregation factor: 2.03 Prefixes being announced from the APNIC address blocks: 4780 Unique aggregates announced from the APNIC address blocks: 2747 APNIC Region origin ASes present in the Internet Routing Table: 545 APNIC Prefixes per ASN: 8.77 APNIC Region origin ASes announcing only one prefix: 227 APNIC Region transit ASes present in the Internet Routing Table: 58 Average APNIC Region AS path length visible: 4.2 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 204 Number of APNIC addresses announced to Internet: 47182592 Equivalent to 2 /8s, 207 /16s and 243 /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: 13763 Total ARIN prefixes after maximum aggregation: 7795 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 13412 Unique aggregates announced from the ARIN address blocks: 9339 ARIN Region origin ASes present in the Internet Routing Table: 1265 ARIN Prefixes per ASN: 10.60 ARIN Region origin ASes announcing only one prefix: 441 ARIN Region transit ASes present in the Internet Routing Table: 168 Average ARIN Region AS path length visible: 3.5 Max ARIN Region AS path length visible: 14 Number of ARIN region 32-bit ASNs visible in the Routing Table: 193 Number of ARIN addresses announced to Internet: 174276352 Equivalent to 10 /8s, 99 /16s and 63 /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: 3630 Total RIPE prefixes after maximum aggregation: 2898 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3857 Unique aggregates announced from the RIPE address blocks: 3198 RIPE Region origin ASes present in the Internet Routing Table: 692 RIPE Prefixes per ASN: 5.57 RIPE Region origin ASes announcing only one prefix: 304 RIPE Region transit ASes present in the Internet Routing Table: 110 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 144 Number of RIPE addresses announced to Internet: 67532288 Equivalent to 4 /8s, 6 /16s and 118 /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: 1457 Total LACNIC prefixes after maximum aggregation: 574 LACNIC Deaggregation factor: 2.54 Prefixes being announced from the LACNIC address blocks: 1458 Unique aggregates announced from the LACNIC address blocks: 788 LACNIC Region origin ASes present in the Internet Routing Table: 168 LACNIC Prefixes per ASN: 8.68 LACNIC Region origin ASes announcing only one prefix: 66 LACNIC Region transit ASes present in the Internet Routing Table: 26 Average LACNIC Region AS path length visible: 5.1 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 69 Number of LACNIC addresses announced to Internet: 4761856 Equivalent to 0 /8s, 72 /16s and 169 /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: 1053 Total AfriNIC prefixes after maximum aggregation: 168 AfriNIC Deaggregation factor: 6.27 Prefixes being announced from the AfriNIC address blocks: 1055 Unique aggregates announced from the AfriNIC address blocks: 216 AfriNIC Region origin ASes present in the Internet Routing Table: 45 AfriNIC Prefixes per ASN: 23.44 AfriNIC Region origin ASes announcing only one prefix: 24 AfriNIC Region transit ASes present in the Internet Routing Table: 8 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 25 Number of AfriNIC addresses announced to Internet: 2744832 Equivalent to 0 /8s, 41 /16s and 226 /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 192 74 141 KREONET-AS-KR KISTI, KR 7575 177 329 120 AARNET-AS-AP Australian Academic and Re 58647 177 18 2 KAGAWAU-AS Kagawa University, JP 4538 130 4192 73 ERX-CERNET-BKB China Education and Rese 55824 126 18 17 NKN-CORE-NW NKN Core Network, IN 4621 70 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/CENIC/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 4418 4617 1986 AMAZON-02, US 14618 816 4019 614 AMAZON-AES, US 8075 378 12791 318 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 203 651 172 DNIC-AS-00668, US 376 201 178 150 RISQ-AS, CA 5786 197 16 1 UPRENET, PR 2152 142 507 92 CSUNET-NW, US 18558 141 18 4 NETBLK-RCOEK, US 81 127 521 30 NCREN, US 270 118 329 82 AS270, US Complete listing at https://bgp.nsrc.org/REN/CENIC/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 5 ISU Internet Services Unit ISU, SA 559 113 533 105 SWITCH Peering requests: peering@switch 1103 94 1502 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 94 27 74 ROEDUNET, RO 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/CENIC/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 153 10 67 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 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/CENIC/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 2018 381 319 71 TENET-1, ZA 36914 258 82 3 KENET-AS, KE 327687 165 28 3 RENU, UG 8094 47 48 18 PUKNET, ZA 327700 42 16 1 MoRENet, MZ 3208 32 2 1 ARN, DZ 6879 24 2 9 ENSTINET-, EG 37074 14 8 2 UG-AS, GH 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW Complete listing at https://bgp.nsrc.org/REN/CENIC/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 4418 4617 1986 AMAZON-02, US 14618 816 4019 614 AMAZON-AES, US 2907 594 2163 466 SINET-AS Research Organization of Infor 7497 437 180 23 CSTNET-AS-AP Computer Network Informati 2018 381 319 71 TENET-1, ZA 8075 378 12791 318 MICROSOFT-CORP-MSN-AS-BLOCK, US 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 668 203 651 172 DNIC-AS-00668, US Complete listing at https://bgp.nsrc.org/REN/CENIC/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 381 310 TENET-1, ZA 36914 258 255 KENET-AS, KE 14618 816 202 AMAZON-AES, US 5786 197 196 UPRENET, PR 58647 177 175 KAGAWAU-AS Kagawa University, JP 1916 213 171 Rede Nacional de Ensino e Pesquisa, BR 327687 165 162 RENU, UG 18558 141 137 NETBLK-RCOEK, US 8895 136 131 ISU Internet Services Unit ISU, SA Complete listing at https://bgp.nsrc.org/REN/CENIC/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/CENIC/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 45.42.252.0/22 Origin: 16509 AMAZON-02, US 45.42.252.0/22 Transit: 2152 CSUNET-NW, US 64.186.3.0/24 Origin: 16509 AMAZON-02, US 64.186.3.0/24 Transit: 2152 CSUNET-NW, US 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 170.39.88.0/24 Origin: 14618 AMAZON-AES, US 170.39.88.0/24 Transit: 16509 AMAZON-02, US 173.249.168.0/22 Origin: 16509 AMAZON-02, US 173.249.168.0/22 Transit: 2152 CSUNET-NW, US Complete listing at https://bgp.nsrc.org/REN/CENIC/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 /10:4 /11:9 /12:29 /13:36 /14:81 /15:202 /16:2139 /17:497 /18:474 /19:614 /20:1023 /21:1194 /22:1932 /23:2010 /24:14325 /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 716 4418 AMAZON-02, US 14618 266 816 AMAZON-AES, US 36914 247 258 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 8075 73 378 MICROSOFT-CORP-MSN-AS-BLOCK, US 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 Complete listing at https://bgp.nsrc.org/REN/CENIC/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 2:1 3:132 4:2 5:20 6:4 8:2 12:1 13:179 14:89 15:129 16:109 18:253 23:46 24:3 31:7 34:2 35:14 38:9 40:1 41:114 42:10 44:8 45:68 46:11 47:1 49:9 50:12 52:879 54:267 58:2 59:19 60:5 61:3 62:17 63:42 64:151 65:34 66:92 67:65 68:21 69:52 70:26 71:45 72:18 74:76 76:48 77:11 78:3 79:10 80:12 81:27 82:7 83:6 84:8 85:44 86:10 87:2 88:1 89:13 91:59 92:4 93:4 94:8 95:2 96:6 97:2 98:13 99:79 101:2 102:28 103:310 104:114 107:1 108:83 109:11 111:17 113:4 114:23 115:1 116:10 117:61 118:32 119:18 121:28 122:11 123:8 124:40 125:4 128:87 129:53 130:153 131:76 132:60 133:152 134:107 135:3 136:212 137:148 138:15 139:18 140:43 141:5 142:60 143:35 144:66 145:5 146:132 147:65 148:204 149:17 150:50 151:24 152:151 153:14 154:30 155:81 156:68 157:30 158:43 159:157 160:36 161:46 162:71 163:94 164:22 165:56 166:2 167:25 168:173 169:12 170:169 171:1 172:12 173:26 174:2 175:27 176:13 177:5 178:2 179:13 180:15 181:1 182:1 184:8 185:103 186:3 187:17 188:15 189:3 190:19 191:13 192:1558 193:314 194:138 195:90 196:197 197:170 198:543 199:342 200:331 201:38 202:639 203:443 204:399 205:168 206:215 207:202 208:124 209:150 210:196 211:14 212:173 213:17 214:8 216:180 217:10 218:22 219:5 220:16 222:2 223:14 End of report