[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ESnet (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Fri Jan 31 22:20:37 UTC 2025
IPv4 R&E Routing Table Report 22:20 GMT Fri 31 Jan, 2025
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: 19299
Prefixes after maximum aggregation (per Origin AS): 10444
Deaggregation factor: 1.85
Unique aggregates announced (without unneeded subnets): 11635
Number of IPv4 prefixes with a valid ROA: 7550
Number of IPv4 prefixes with an invalid ROA: 2
Number of IPv4 prefixes with no ROA: 11747
Total ASes present in the Internet Routing Table: 2779
Prefixes per ASN: 6.94
Origin-only ASes present in the Internet Routing Table: 2402
Origin ASes announcing only one prefix: 1076
Transit ASes present in the Internet Routing Table: 377
Transit-only ASes present in the Internet Routing Table: 75
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 3.8
Max AS path length visible: 18
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 2
Number of instances of unregistered ASNs: 2
Number of 32-bit ASNs allocated by the RIRs: 46093
Number of 32-bit ASNs visible in the Routing Table: 679
Prefixes from 32-bit ASNs in the Routing Table: 1861
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: 3
Number of addresses announced to Internet: 168944896
Equivalent to 10 /8s, 17 /16s and 229 /24s
Percentage of available address space announced: 4.6
Percentage of allocated address space announced: 4.6
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: 2320
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4625
Total APNIC prefixes after maximum aggregation: 2229
APNIC Deaggregation factor: 2.07
Prefixes being announced from the APNIC address blocks: 4625
Unique aggregates announced from the APNIC address blocks: 2627
APNIC Region origin ASes present in the Internet Routing Table: 553
APNIC Prefixes per ASN: 8.36
APNIC Region origin ASes announcing only one prefix: 232
APNIC Region transit ASes present in the Internet Routing Table: 57
Average APNIC Region AS path length visible: 3.6
Max APNIC Region AS path length visible: 12
Number of APNIC region 32-bit ASNs visible in the Routing Table: 204
Number of APNIC addresses announced to Internet: 35691264
Equivalent to 2 /8s, 32 /16s and 155 /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: 8533
Total ARIN prefixes after maximum aggregation: 4694
ARIN Deaggregation factor: 1.82
Prefixes being announced from the ARIN address blocks: 8544
Unique aggregates announced from the ARIN address blocks: 5176
ARIN Region origin ASes present in the Internet Routing Table: 1283
ARIN Prefixes per ASN: 6.66
ARIN Region origin ASes announcing only one prefix: 455
ARIN Region transit ASes present in the Internet Routing Table: 157
Average ARIN Region AS path length visible: 3.8
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 225
Number of ARIN addresses announced to Internet: 73021696
Equivalent to 4 /8s, 90 /16s and 57 /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: 3553
Total RIPE prefixes after maximum aggregation: 2828
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 3544
Unique aggregates announced from the RIPE address blocks: 2922
RIPE Region origin ASes present in the Internet Routing Table: 667
RIPE Prefixes per ASN: 5.31
RIPE Region origin ASes announcing only one prefix: 306
RIPE Region transit ASes present in the Internet Routing Table: 108
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: 156
Number of RIPE addresses announced to Internet: 53724672
Equivalent to 3 /8s, 51 /16s and 198 /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: 1458
Total LACNIC prefixes after maximum aggregation: 522
LACNIC Deaggregation factor: 2.79
Prefixes being announced from the LACNIC address blocks: 1456
Unique aggregates announced from the LACNIC address blocks: 690
LACNIC Region origin ASes present in the Internet Routing Table: 151
LACNIC Prefixes per ASN: 9.64
LACNIC Region origin ASes announcing only one prefix: 54
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: 65
Number of LACNIC addresses announced to Internet: 4107776
Equivalent to 0 /8s, 62 /16s and 174 /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: 1128
Total AfriNIC prefixes after maximum aggregation: 169
AfriNIC Deaggregation factor: 6.67
Prefixes being announced from the AfriNIC address blocks: 1127
Unique aggregates announced from the AfriNIC address blocks: 217
AfriNIC Region origin ASes present in the Internet Routing Table: 48
AfriNIC Prefixes per ASN: 23.48
AfriNIC Region origin ASes announcing only one prefix: 29
AfriNIC Region transit ASes present in the Internet Routing Table: 10
Average AfriNIC Region AS path length visible: 4.4
Max AfriNIC Region AS path length visible: 18
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 29
Number of AfriNIC addresses announced to Internet: 2396928
Equivalent to 0 /8s, 36 /16s and 147 /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 626 2202 463 SINET-AS Research Organization of Informa
7497 450 180 24 CSTNET-AS-AP Computer Network Information
1237 191 74 145 KREONET-AS-KR KISTI, KR
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 168 297 112 AARNET-AS-AP Australian Academic and Rese
55824 147 19 21 NKN-CORE-NW NKN Core Network, IN
4538 122 2384 69 ERX-CERNET-BKB China Education and Resear
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 69 37 10 UNINET-AS-AP UNINET-, TH
23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR
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
2152 527 507 99 CENIC-2152, US
2920 226 44 49 LACOE, US
376 202 162 151 RISQ-AS, CA
5786 198 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 128 471 35 NCREN, US
23024 97 7 17 OCDE, US
21976 88 34 14 NJEDGE-NET, US
237 85 542 51 MERIT-AS-14, US
1736 79 16 1 MU-AS, 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
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
786 203 1767 183 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 110 24 5 ISU Internet Services Unit ISU, SA
1103 94 1231 81 SURFNET-NL SURFnet, The Netherlands, NL
2614 93 26 73 ROEDUNET, RO
137 82 677 77 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
553 78 462 78 BELWUE BelWue-Koordination, DE
3267 76 26 66 NIKS, RU
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 236 178 42 Rede Nacional de Ensino e Pesquisa, BR
28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M
11340 108 25 51 Red Universitaria Nacional, CL
271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
4270 53 16 1 Red de Interconexion Universitaria, AR
61468 52 5 17 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
2715 44 99 33 Fundacao Carlos Chagas Filho de Amparo a
28614 38 2 2 Fundacao Universidade Regional de Blumena
3596 37 8 4 Universidad Autonoma Metropolitana, MX
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
36914 548 82 3 KENET-AS, KE
2018 371 319 71 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 12 8 4 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
327700 11 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/ESnet/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 626 2202 463 SINET-AS Research Organization of Informa
36914 548 82 3 KENET-AS, KE
2152 527 507 99 CENIC-2152, US
7497 450 180 24 CSTNET-AS-AP Computer Network Information
2018 371 319 71 TENET-1, ZA
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
1916 236 178 42 Rede Nacional de Ensino e Pesquisa, BR
2920 226 44 49 LACOE, US
786 203 1767 183 JANET Jisc Services Limited, GB
376 202 162 151 RISQ-AS, CA
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 548 545 KENET-AS, KE
2152 527 428 CENIC-2152, US
7497 450 426 CSTNET-AS-AP Computer Network Information Cente
2018 371 300 TENET-1, ZA
5786 198 197 UPRENET, PR
1916 236 194 Rede Nacional de Ensino e Pesquisa, BR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 226 177 LACOE, US
18558 140 135 NETBLK-RCOEK, US
55824 147 126 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
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
22272 UNALLOCATED 206.208.24.0/21 6325 ILLINOIS-CENTURY, US
Complete listing at https://bgp.nsrc.org/REN/ESnet/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
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/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 /14:33 /15:117 /16:1933 /17:423 /18:453
/19:580 /20:858 /21:861 /22:1486 /23:1602 /24:10953
/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 524 548 KENET-AS, KE
8895 107 110 ISU Internet Services Unit ISU, SA
2152 62 527 CENIC-2152, US
23024 36 97 OCDE, US
3267 34 76 NIKS, RU
32440 33 58 LONI, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
200521 32 56 SEAP-AGE, ES
25977 30 44 HCCS, US
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:15 8:5 12:2 14:93 18:43
23:11 24:3 31:1 35:9 37:8 38:13
40:1 41:219 42:11 44:4 45:50 46:4
47:1 49:11 50:4 52:1 59:19 60:6
61:3 62:7 63:37 64:45 65:19 66:52
67:42 68:20 69:18 70:2 71:1 72:8
74:53 76:38 77:10 78:3 79:10 80:14
81:25 82:7 83:7 84:5 85:46 86:2
87:1 89:10 91:42 92:2 93:14 94:2
95:2 96:5 97:1 98:2 102:11 103:297
104:80 107:2 108:8 109:5 111:21 113:1
114:24 116:7 117:61 118:32 119:23 121:27
122:8 123:8 124:42 125:5 128:59 129:37
130:96 131:65 132:64 133:156 134:105 136:198
137:98 138:58 139:5 140:31 141:3 142:41
143:25 144:29 145:2 146:135 147:55 148:199
149:13 150:70 151:13 152:127 153:14 154:45
155:59 156:131 157:25 158:31 159:117 160:31
161:18 162:30 163:59 164:10 165:50 166:2
167:26 168:119 169:7 170:103 171:1 172:2
173:6 174:1 175:16 177:6 179:12 180:16
181:1 182:11 184:2 185:49 186:3 187:21
188:14 189:3 190:34 191:13 192:1388 193:305
194:116 195:71 196:145 197:334 198:531 199:253
200:329 201:36 202:637 203:433 204:402 205:175
206:212 207:309 208:65 209:159 210:220 211:3
212:147 213:6 216:93 217:9 218:22 219:6
220:16 222:2 223:4
End of report
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