[REN-BGP-stats-all] IPv4 R&E Routing Table Report - REANNZ (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sat Jun 7 21:15:40 UTC 2025
IPv4 R&E Routing Table Report 21:15 GMT Sat 07 Jun, 2025
IPv4 BGP Table (R&E) as seen at REANNZ.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/REANNZ/
Analysis Summary
----------------
BGP routing table entries examined: 19547
Prefixes after maximum aggregation (per Origin AS): 10809
Deaggregation factor: 1.81
Unique aggregates announced (without unneeded subnets): 11961
Number of IPv4 prefixes with a valid ROA: 7636
Number of IPv4 prefixes with an invalid ROA: 2
Number of IPv4 prefixes with no ROA: 11909
Total ASes present in the Internet Routing Table: 2798
Prefixes per ASN: 6.99
Origin-only ASes present in the Internet Routing Table: 2433
Origin ASes announcing only one prefix: 1078
Transit ASes present in the Internet Routing Table: 365
Transit-only ASes present in the Internet Routing Table: 57
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 21
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: 707
Prefixes from 32-bit ASNs in the Routing Table: 1906
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: 203238656
Equivalent to 12 /8s, 29 /16s and 45 /24s
Percentage of available address space announced: 5.5
Percentage of allocated address space announced: 5.5
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: 2331
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4787
Total APNIC prefixes after maximum aggregation: 2310
APNIC Deaggregation factor: 2.07
Prefixes being announced from the APNIC address blocks: 4785
Unique aggregates announced from the APNIC address blocks: 2623
APNIC Region origin ASes present in the Internet Routing Table: 601
APNIC Prefixes per ASN: 7.96
APNIC Region origin ASes announcing only one prefix: 251
APNIC Region transit ASes present in the Internet Routing Table: 53
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 14
Number of APNIC region 32-bit ASNs visible in the Routing Table: 243
Number of APNIC addresses announced to Internet: 45585664
Equivalent to 2 /8s, 183 /16s and 149 /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: 8724
Total ARIN prefixes after maximum aggregation: 4975
ARIN Deaggregation factor: 1.75
Prefixes being announced from the ARIN address blocks: 8771
Unique aggregates announced from the ARIN address blocks: 5507
ARIN Region origin ASes present in the Internet Routing Table: 1300
ARIN Prefixes per ASN: 6.75
ARIN Region origin ASes announcing only one prefix: 454
ARIN Region transit ASes present in the Internet Routing Table: 159
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 223
Number of ARIN addresses announced to Internet: 93039872
Equivalent to 5 /8s, 139 /16s and 173 /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: 3558
Total RIPE prefixes after maximum aggregation: 2854
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 3544
Unique aggregates announced from the RIPE address blocks: 2927
RIPE Region origin ASes present in the Internet Routing Table: 653
RIPE Prefixes per ASN: 5.43
RIPE Region origin ASes announcing only one prefix: 290
RIPE Region transit ASes present in the Internet Routing Table: 105
Average RIPE Region AS path length visible: 4.7
Max RIPE Region AS path length visible: 15
Number of RIPE region 32-bit ASNs visible in the Routing Table: 152
Number of RIPE addresses announced to Internet: 58003456
Equivalent to 3 /8s, 117 /16s and 16 /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: 1281
Total LACNIC prefixes after maximum aggregation: 490
LACNIC Deaggregation factor: 2.61
Prefixes being announced from the LACNIC address blocks: 1281
Unique aggregates announced from the LACNIC address blocks: 674
LACNIC Region origin ASes present in the Internet Routing Table: 132
LACNIC Prefixes per ASN: 9.70
LACNIC Region origin ASes announcing only one prefix: 56
LACNIC Region transit ASes present in the Internet Routing Table: 24
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 11
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 58
Number of LACNIC addresses announced to Internet: 4075520
Equivalent to 0 /8s, 62 /16s and 48 /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: 1164
Total AfriNIC prefixes after maximum aggregation: 175
AfriNIC Deaggregation factor: 6.65
Prefixes being announced from the AfriNIC address blocks: 1163
Unique aggregates announced from the AfriNIC address blocks: 227
AfriNIC Region origin ASes present in the Internet Routing Table: 53
AfriNIC Prefixes per ASN: 21.94
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: 5.3
Max AfriNIC Region AS path length visible: 21
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 31
Number of AfriNIC addresses announced to Internet: 2531584
Equivalent to 0 /8s, 38 /16s and 161 /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 595 2170 464 SINET-AS Research Organization of Informa
7497 456 180 24 CSTNET-AS-AP Computer Network Information
1237 193 74 146 KREONET-AS-KR KISTI, KR
4538 193 4192 72 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 173 281 117 AARNET-AS-AP Australian Academic and Rese
55824 148 19 21 NKN-CORE-NW NKN Core Network, IN
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 67 37 9 UNINET-AS-AP UNINET-, TH
1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA
Complete listing at https://bgp.nsrc.org/REN/REANNZ/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
2152 547 507 99 CENIC-2152, US
2920 229 44 49 LACOE, US
668 212 648 180 DNIC-AS-00668, US
376 200 162 150 RISQ-AS, CA
5786 199 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 129 519 34 NCREN, US
270 117 328 81 AS270, US
23024 99 7 17 OCDE, US
21976 90 34 16 NJEDGE-NET, US
Complete listing at https://bgp.nsrc.org/REN/REANNZ/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
786 194 1742 187 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 109 24 5 ISU Internet Services Unit ISU, SA
1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL
2614 92 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
3267 75 29 69 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/REANNZ/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 242 178 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 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
2715 52 100 36 Fundacao Carlos Chagas Filho de Amparo a
61468 51 3 21 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
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/REANNZ/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 374 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 36 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 9 6 3 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/REANNZ/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 595 2170 464 SINET-AS Research Organization of Informa
36914 558 82 3 KENET-AS, KE
2152 547 507 99 CENIC-2152, US
7497 456 180 24 CSTNET-AS-AP Computer Network Information
2018 374 318 69 TENET-1, ZA
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
1916 242 178 41 Rede Nacional de Ensino e Pesquisa, BR
2920 229 44 49 LACOE, US
668 212 648 180 DNIC-AS-00668, US
376 200 162 150 RISQ-AS, CA
Complete listing at https://bgp.nsrc.org/REN/REANNZ/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 558 555 KENET-AS, KE
2152 547 448 CENIC-2152, US
7497 456 432 CSTNET-AS-AP Computer Network Information Cente
2018 374 305 TENET-1, ZA
1916 242 201 Rede Nacional de Ensino e Pesquisa, BR
5786 199 198 UPRENET, PR
2920 229 180 LACOE, US
58647 182 180 KAGAWAU-AS Kagawa University, JP
18558 140 135 NETBLK-RCOEK, US
55824 148 127 NKN-CORE-NW NKN Core Network, IN
Complete listing at https://bgp.nsrc.org/REN/REANNZ/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 131.187.248.0/22 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
26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US
Complete listing at https://bgp.nsrc.org/REN/REANNZ/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/REANNZ/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 /12:11
/13:19 /14:35 /15:115 /16:2015 /17:423 /18:469
/19:599 /20:867 /21:874 /22:1489 /23:1638 /24:10990
/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 534 558 KENET-AS, KE
8895 106 109 ISU Internet Services Unit ISU, SA
2152 64 547 CENIC-2152, US
23024 38 99 OCDE, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
3267 31 75 NIKS, RU
32440 31 56 LONI, US
200521 31 56 SEAP-AGE, ES
25977 30 44 HCCS, US
Complete listing at https://bgp.nsrc.org/REN/REANNZ/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 23:11 24:3 31:1 35:10 37:9
38:11 40:1 41:224 42:18 44:5 45:47
46:5 47:1 49:12 50:5 52:1 58:15
59:20 60:6 61:3 62:8 63:37 64:44
65:6 66:57 67:41 68:12 69:17 70:2
71:1 72:7 74:54 76:35 77:9 78:3
79:9 80:13 81:11 82:6 83:8 84:7
85:51 86:6 87:1 89:10 91:41 92:2
93:15 94:2 95:2 96:5 97:1 98:2
101:3 102:11 103:365 104:79 107:2 108:8
109:4 111:21 113:1 114:24 116:9 117:61
118:35 119:31 121:28 122:8 123:8 124:42
125:5 128:55 129:44 130:98 131:65 132:65
133:156 134:110 136:200 137:101 138:10 139:5
140:32 141:4 142:27 143:27 144:21 145:2
146:137 147:54 148:201 149:12 150:36 151:11
152:138 153:15 154:47 155:84 156:128 157:26
158:25 159:117 160:34 161:19 162:24 163:65
164:10 165:43 167:28 168:103 169:7 170:26
171:1 172:2 173:6 175:16 177:5 179:12
180:16 181:1 182:12 184:7 185:50 186:3
187:25 188:15 189:3 190:17 191:13 192:1522
193:283 194:130 195:73 196:149 197:341 198:553
199:278 200:303 201:39 202:601 203:426 204:400
205:175 206:196 207:311 208:68 209:171 210:209
211:3 212:147 213:4 214:10 216:94 217:22
218:23 219:7 220:16 222:4 223:17
End of report
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