[REN-BGP-stats-all] IPv4 R&E Routing Table Report - Janet (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Thu Apr 10 17:15:40 UTC 2025
IPv4 R&E Routing Table Report 17:15 GMT Thu 10 Apr, 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: 18311
Prefixes after maximum aggregation (per Origin AS): 10205
Deaggregation factor: 1.79
Unique aggregates announced (without unneeded subnets): 11261
Number of IPv4 prefixes with a valid ROA: 7165
Number of IPv4 prefixes with an invalid ROA: 2
Number of IPv4 prefixes with no ROA: 11144
Total ASes present in the Internet Routing Table: 2625
Prefixes per ASN: 6.98
Origin-only ASes present in the Internet Routing Table: 2282
Origin ASes announcing only one prefix: 1021
Transit ASes present in the Internet Routing Table: 343
Transit-only ASes present in the Internet Routing Table: 52
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 20
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 34
Number of instances of unregistered ASNs: 34
Number of 32-bit ASNs allocated by the RIRs: 46164
Number of 32-bit ASNs visible in the Routing Table: 652
Prefixes from 32-bit ASNs in the Routing Table: 1788
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: 198964224
Equivalent to 11 /8s, 219 /16s and 244 /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: 2080
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4664
Total APNIC prefixes after maximum aggregation: 2225
APNIC Deaggregation factor: 2.10
Prefixes being announced from the APNIC address blocks: 4663
Unique aggregates announced from the APNIC address blocks: 2514
APNIC Region origin ASes present in the Internet Routing Table: 558
APNIC Prefixes per ASN: 8.36
APNIC Region origin ASes announcing only one prefix: 239
APNIC Region transit ASes present in the Internet Routing Table: 49
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 223
Number of APNIC addresses announced to Internet: 45374976
Equivalent to 2 /8s, 180 /16s and 94 /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: 7944
Total ARIN prefixes after maximum aggregation: 4701
ARIN Deaggregation factor: 1.69
Prefixes being announced from the ARIN address blocks: 7992
Unique aggregates announced from the ARIN address blocks: 5225
ARIN Region origin ASes present in the Internet Routing Table: 1256
ARIN Prefixes per ASN: 6.36
ARIN Region origin ASes announcing only one prefix: 446
ARIN Region transit ASes present in the Internet Routing Table: 148
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: 211
Number of ARIN addresses announced to Internet: 90631680
Equivalent to 5 /8s, 102 /16s and 238 /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: 3257
Total RIPE prefixes after maximum aggregation: 2617
RIPE Deaggregation factor: 1.24
Prefixes being announced from the RIPE address blocks: 3244
Unique aggregates announced from the RIPE address blocks: 2634
RIPE Region origin ASes present in the Internet Routing Table: 577
RIPE Prefixes per ASN: 5.62
RIPE Region origin ASes announcing only one prefix: 256
RIPE Region transit ASes present in the Internet Routing Table: 99
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: 131
Number of RIPE addresses announced to Internet: 56502272
Equivalent to 3 /8s, 94 /16s and 40 /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: 1263
Total LACNIC prefixes after maximum aggregation: 479
LACNIC Deaggregation factor: 2.64
Prefixes being announced from the LACNIC address blocks: 1261
Unique aggregates announced from the LACNIC address blocks: 657
LACNIC Region origin ASes present in the Internet Routing Table: 125
LACNIC Prefixes per ASN: 10.09
LACNIC Region origin ASes announcing only one prefix: 49
LACNIC Region transit ASes present in the Internet Routing Table: 20
Average LACNIC Region AS path length visible: 5.6
Max LACNIC Region AS path length visible: 11
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 55
Number of LACNIC addresses announced to Internet: 3940864
Equivalent to 0 /8s, 60 /16s and 34 /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: 1149
Total AfriNIC prefixes after maximum aggregation: 177
AfriNIC Deaggregation factor: 6.49
Prefixes being announced from the AfriNIC address blocks: 1148
Unique aggregates announced from the AfriNIC address blocks: 228
AfriNIC Region origin ASes present in the Internet Routing Table: 54
AfriNIC Prefixes per ASN: 21.26
AfriNIC Region origin ASes announcing only one prefix: 31
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: 20
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 32
Number of AfriNIC addresses announced to Internet: 2511872
Equivalent to 0 /8s, 38 /16s and 84 /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 193 74 145 KREONET-AS-KR KISTI, KR
4538 193 4192 71 ERX-CERNET-BKB China Education and Resear
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 173 281 116 AARNET-AS-AP Australian Academic and Rese
55824 147 19 21 NKN-CORE-NW NKN Core Network, IN
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA
4621 59 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
376 200 162 150 RISQ-AS, CA
668 200 645 171 DNIC-AS-00668, US
5786 199 16 1 UPRENET, PR
2920 172 34 7 LACOE, US
2152 148 507 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 85 542 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
680 285 1899 250 DFN Verein zur Foerderung eines Deutschen
786 193 1747 185 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 108 24 5 ISU Internet Services Unit ISU, SA
1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL
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
553 75 366 75 BELWUE BelWue-Koordination, DE
2200 63 614 58 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 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
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
3596 37 8 4 Universidad Autonoma Metropolitana, MX
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 551 82 3 KENET-AS, KE
2018 372 318 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 10 8 4 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
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 551 82 3 KENET-AS, KE
7497 452 180 24 CSTNET-AS-AP Computer Network Information
2018 372 318 69 TENET-1, ZA
680 285 1899 250 DFN Verein zur Foerderung eines Deutschen
1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR
376 200 162 150 RISQ-AS, CA
668 200 645 171 DNIC-AS-00668, US
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 551 548 KENET-AS, KE
7497 452 428 CSTNET-AS-AP Computer Network Information Cente
2018 372 303 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 172 165 LACOE, US
18558 139 135 NETBLK-RCOEK, US
55824 147 126 NKN-CORE-NW NKN Core Network, IN
4538 193 122 ERX-CERNET-BKB China Education and Research Net
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
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
26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US
26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, 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
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
/13:19 /14:35 /15:115 /16:1984 /17:411 /18:451
/19:570 /20:819 /21:840 /22:1341 /23:1463 /24:10250
/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 527 551 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
40326 29 33 ECKERD-COLLEGE, US
Complete listing at https://bgp.nsrc.org/REN/Janet/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:16 6:4 8:2 12:1 14:93
23:8 24:2 31:1 35:9 37:9 38:10
40:1 41:222 42:14 44:4 45:39 46:4
47:1 49:8 50:2 52:1 58:15 59:20
60:6 61:3 62:6 63:32 64:43 65:5
66:34 67:40 68:10 69:16 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 91:38 93:13 94:2 95:2
96:5 97:1 98:2 101:3 102:11 103:306
104:79 108:8 109:5 111:17 113:1 114:24
116:7 117:61 118:33 119:30 121:28 122:8
123:8 124:42 125:1 128:57 129:41 130:97
131:63 132:66 133:157 134:108 136:200 137:54
138:10 139:11 140:33 141:4 142:26 143:25
144:27 145:2 146:137 147:54 148:199 149:11
150:69 151:8 152:128 153:15 154:45 155:84
156:134 157:25 158:29 159:117 160:34 161:16
162:22 163:62 164:13 165:48 167:9 168:103
169:7 170:16 172:2 173:6 175:5 177:7
179:12 180:16 181:1 182:4 184:6 185:42
186:3 187:26 188:12 189:3 190:17 191:13
192:1415 193:259 194:105 195:75 196:147 197:335
198:465 199:276 200:291 201:36 202:624 203:429
204:372 205:134 206:212 207:221 208:63 209:118
210:208 211:4 212:144 213:4 214:8 216:90
217:21 218:2 219:6 220:17 222:4 223:4
End of report
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