This is an automated weekly mailing describing the state of the IPv4 Research & Education Routing Table received by NSRC's collector from Guam's network. Daily listings are sent to ren-bgp-stats-all@lists.nsrc.org. For historical data, please see https://bgp.nsrc.org. If you have any comments please contact Philip Smith . IPv4 R&E Routing Table Report 21:20 GMT Sat 07 Jun, 2025 IPv4 BGP Table (R&E) as seen at Guam. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/UniGuam/ Analysis Summary ---------------- BGP routing table entries examined: 18301 Prefixes after maximum aggregation (per Origin AS): 9050 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 591 Number of IPv4 prefixes with a valid ROA: 7571 Number of IPv4 prefixes with an invalid ROA: 0 Number of IPv4 prefixes with no ROA: 10730 Total ASes present in the Internet Routing Table: 2664 Prefixes per ASN: 6.87 Origin-only ASes present in the Internet Routing Table: 2296 Origin ASes announcing only one prefix: 1004 Transit ASes present in the Internet Routing Table: 368 Transit-only ASes present in the Internet Routing Table: 72 Paths with bogon ASNs present in the IPv4 Routing Table: 60 Average AS path length visible in the Internet Routing Table: 5.7 Max AS path length visible: 22 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 46622 Number of 32-bit ASNs visible in the Routing Table: 682 Prefixes from 32-bit ASNs in the Routing Table: 1815 Number of bogon 32-bit ASNs visible in the Routing Table: 72 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 1 Number of addresses announced to Internet: 3225389616 Equivalent to 192 /8s, 63 /16s and 138 /24s Percentage of available address space announced: 87.1 Percentage of allocated address space announced: 87.1 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: 1923 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4072 Total APNIC prefixes after maximum aggregation: 1657 APNIC Deaggregation factor: 2.46 Prefixes being announced from the APNIC address blocks: 4073 Unique aggregates announced from the APNIC address blocks: 6 APNIC Region origin ASes present in the Internet Routing Table: 499 APNIC Prefixes per ASN: 8.16 APNIC Region origin ASes announcing only one prefix: 202 APNIC Region transit ASes present in the Internet Routing Table: 50 Average APNIC Region AS path length visible: 6.3 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 229 Number of APNIC addresses announced to Internet: 590336 Equivalent to 0 /8s, 9 /16s and 2 /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: 8079 Total ARIN prefixes after maximum aggregation: 4687 ARIN Deaggregation factor: 1.72 Prefixes being announced from the ARIN address blocks: 8124 Unique aggregates announced from the ARIN address blocks: 148 ARIN Region origin ASes present in the Internet Routing Table: 1250 ARIN Prefixes per ASN: 6.50 ARIN Region origin ASes announcing only one prefix: 431 ARIN Region transit ASes present in the Internet Routing Table: 158 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 17 Number of ARIN region 32-bit ASNs visible in the Routing Table: 209 Number of ARIN addresses announced to Internet: -2146878288 Equivalent to 128 /8s, 9 /16s and 60 /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: 3562 Total RIPE prefixes after maximum aggregation: 2051 RIPE Deaggregation factor: 1.74 Prefixes being announced from the RIPE address blocks: 3549 Unique aggregates announced from the RIPE address blocks: 435 RIPE Region origin ASes present in the Internet Routing Table: 651 RIPE Prefixes per ASN: 5.45 RIPE Region origin ASes announcing only one prefix: 286 RIPE Region transit ASes present in the Internet Routing Table: 105 Average RIPE Region AS path length visible: 5.7 Max RIPE Region AS path length visible: 16 Number of RIPE region 32-bit ASNs visible in the Routing Table: 151 Number of RIPE addresses announced to Internet: 2966400 Equivalent to 0 /8s, 45 /16s and 67 /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: 1383 Total LACNIC prefixes after maximum aggregation: 481 LACNIC Deaggregation factor: 2.88 Prefixes being announced from the LACNIC address blocks: 1383 Unique aggregates announced from the LACNIC address blocks: 0 LACNIC Region origin ASes present in the Internet Routing Table: 137 LACNIC Prefixes per ASN: 10.09 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: 5.9 Max LACNIC Region AS path length visible: 12 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 0 Equivalent to 0 /8s, 0 /16s and 0 /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: 1172 Total AfriNIC prefixes after maximum aggregation: 162 AfriNIC Deaggregation factor: 7.23 Prefixes being announced from the AfriNIC address blocks: 1171 Unique aggregates announced from the AfriNIC address blocks: 2 AfriNIC Region origin ASes present in the Internet Routing Table: 53 AfriNIC Prefixes per ASN: 22.09 AfriNIC Region origin ASes announcing only one prefix: 27 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 6.3 Max AfriNIC Region AS path length visible: 22 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 31 Number of AfriNIC addresses announced to Internet: 1073743872 Equivalent to 64 /8s, 0 /16s and 8 /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 7497 456 262242 30 CSTNET-AS-AP Computer Network Informatio 1237 196 262194 174 KREONET-AS-KR KISTI, KR 4538 193 789723 50 ERX-CERNET-BKB China Education and Resea 7575 190 262159 88 AARNET-AS-AP Australian Academic and Res 55824 148 524306 12 NKN-CORE-NW NKN Core Network, IN 10079 145 16 1 UNIWESTSYD-AS-AP University of Western Sy 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 24313 70 16 1 NSW-DET-AS NSW Department of Education, A 4621 67 262178 14 UNINET-AS-AP UNINET-, TH 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 668 212 786718 104 DNIC-AS-00668, US 376 200 786586 162 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 176 34 7 LACOE, US 2152 151 524573 64 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 524806 34 NCREN, US 1 128 524289 50 LVLT-1, US 270 117 312 84 AS270, US 23024 99 524292 18 OCDE, US Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 284 140 36 DFN Verein zur Foerderung eines Deutschen 786 194 786924 45 JANET Jisc Services Limited, GB 559 114 262649 34 SWITCH Peering requests: peering@switch. 8895 109 262168 5 ISU Internet Services Unit ISU, SA 1103 98 787323 50 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 262164 18 ROEDUNET, RO 137 82 262738 38 ASGARR Consortium GARR, IT 1930 79 262165 5 RCCN Fundacao para a Ciencia e a Tecnolo 3267 76 262166 42 NIKS, RU 553 75 524641 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 326 524445 56 Rede Nacional de Ensino e Pesquisa, BR 28391 159 262149 31 Universidad Juarez Autonoma de Tabasco, 11340 110 262146 8 Red Universitaria Nacional, CL 271640 68 262144 68 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 52 262244 36 Fundacao Carlos Chagas Filho de Amparo a 61468 51 262145 5 CEDIA, EC 19611 48 16 13 Associacao Antonio Vieira - Unisinos, BR 3596 40 262150 3 Universidad Autonoma Metropolitana, MX 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 524316 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 558 82 3 KENET-AS, KE 2018 374 262448 71 TENET-1, ZA 8094 47 262150 4 PUKNET, ZA 37215 36 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 524288 5 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 37661 9 262148 2 NRaE1-AS, NG Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 36914 558 82 3 KENET-AS, KE 7497 456 262242 30 CSTNET-AS-AP Computer Network Informatio 2018 374 262448 71 TENET-1, ZA 1916 326 524445 56 Rede Nacional de Ensino e Pesquisa, BR 680 284 140 36 DFN Verein zur Foerderung eines Deutschen 668 212 786718 104 DNIC-AS-00668, US 376 200 786586 162 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 1237 196 262194 174 KREONET-AS-KR KISTI, KR 786 194 786924 45 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 7497 456 426 CSTNET-AS-AP Computer Network Information Cente 2018 374 303 TENET-1, ZA 1916 326 270 Rede Nacional de Ensino e Pesquisa, BR 680 284 248 DFN Verein zur Foerderung eines Deutschen Forsc 5786 199 198 UPRENET, PR 2920 176 169 LACOE, US 786 194 149 JANET Jisc Services Limited, GB 10079 145 144 UNIWESTSYD-AS-AP University of Western Sydney, 4538 193 143 ERX-CERNET-BKB China Education and Research Net 55824 148 136 NKN-CORE-NW NKN Core Network, IN Complete listing at https://bgp.nsrc.org/REN/UniGuam/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 26898 UNALLOCATED 131.187.248.0/2 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/2 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/2 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/2 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/2 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/2 Origin: 37661 NRaE1-AS, NG 164.160.192.0/2 Transit: 37288 WACREN, SN Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:375 /2:4598 /3:3 /4:0 /5:0 /6:0 /7:0 /8:0 /9:1 /10:1 /11:1 /12:11 /13:18 /14:31 /15:114 /16:1805 /17:275 /18:314 /19:399 /20:570 /21:568 /22:913 /23:976 /24:7087 /25:37 /26:57 /27:86 /28:8 /29:48 /30:4 /31:0 /32:1 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 379 558 KENET-AS, KE 8895 63 109 ISU Internet Services Unit ISU, SA 1916 60 326 Rede Nacional de Ensino e Pesquisa, BR 23024 34 99 OCDE, US 3267 32 76 NIKS, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 25977 30 44 HCCS, US 37215 30 36 MAREN, MW 1 29 128 LVLT-1, US Complete listing at https://bgp.nsrc.org/REN/UniGuam/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 4:2 5:16 6:4 8:2 12:2 14:93 23:9 24:1 31:1 35:8 37:9 38:11 40:1 41:224 42:18 44:4 45:47 46:5 47:1 49:12 50:3 52:1 58:15 59:20 60:6 61:3 62:8 63:32 64:44 65:5 66:42 67:41 68:18 69:18 70:2 71:1 72:7 74:52 76:35 77:9 78:3 79:9 80:13 81:11 82:6 83:8 84:8 85:51 86:6 87:1 89:10 91:41 92:2 93:15 94:2 95:2 96:5 97:1 98:2 101:3 102:3 103:214 104:43 108:10 111:16 113:1 114:24 116:9 117:61 118:1 119:31 121:24 123:8 124:42 125:5 128:49 129:22 130:53 131:38 132:25 134:94 136:87 137:100 138:17 139:6 140:13 141:2 142:20 143:15 144:8 146:125 147:27 148:88 149:8 150:20 151:8 152:136 153:14 154:47 155:58 156:127 157:23 158:20 159:44 160:3 161:7 162:23 163:32 164:5 165:6 167:7 168:46 169:3 170:14 171:1 172:1 173:5 175:11 177:6 179:10 180:16 182:11 185:30 186:2 187:24 188:13 189:3 190:16 191:13 192:1027 193:202 194:101 195:49 196:146 197:186 198:262 199:169 200:190 201:35 202:400 203:248 204:202 205:64 206:115 207:127 208:36 209:102 210:136 211:3 212:66 213:3 214:10 216:43 217:4 218:3 220:13 222:1 223:17 End of report