[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Thu Apr 17 22:35:54 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Thu 17 Apr, 2025
IPv4 BGP Table (R&E) as seen at RouteViews PacWave.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/PacWave/
Analysis Summary
----------------
BGP routing table entries examined: 32362
Prefixes after maximum aggregation (per Origin AS): 15724
Deaggregation factor: 2.06
Unique aggregates announced (without unneeded subnets): 18693
Total ASes present in the Internet Routing Table: 2886
Prefixes per ASN: 11.21
Origin-only ASes present in the Internet Routing Table: 2505
Origin ASes announcing only one prefix: 1104
Transit ASes present in the Internet Routing Table: 381
Transit-only ASes present in the Internet Routing Table: 63
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 3.5
Max AS path length visible: 21
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 37
Number of instances of unregistered ASNs: 37
Number of 32-bit ASNs allocated by the RIRs: 46228
Number of 32-bit ASNs visible in the Routing Table: 732
Prefixes from 32-bit ASNs in the Routing Table: 4985
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: 10
Number of addresses announced to Internet: 345575168
Equivalent to 20 /8s, 153 /16s and 15 /24s
Percentage of available address space announced: 9.3
Percentage of allocated address space announced: 9.3
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: 4251
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4907
Total APNIC prefixes after maximum aggregation: 2332
APNIC Deaggregation factor: 2.10
Prefixes being announced from the APNIC address blocks: 5137
Unique aggregates announced from the APNIC address blocks: 2909
APNIC Region origin ASes present in the Internet Routing Table: 605
APNIC Prefixes per ASN: 8.49
APNIC Region origin ASes announcing only one prefix: 252
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: 247
Number of APNIC addresses announced to Internet: 47346944
Equivalent to 2 /8s, 210 /16s and 117 /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: 21317
Total ARIN prefixes after maximum aggregation: 9777
ARIN Deaggregation factor: 2.18
Prefixes being announced from the ARIN address blocks: 20504
Unique aggregates announced from the ARIN address blocks: 11253
ARIN Region origin ASes present in the Internet Routing Table: 1366
ARIN Prefixes per ASN: 15.01
ARIN Region origin ASes announcing only one prefix: 477
ARIN Region transit ASes present in the Internet Routing Table: 172
Average ARIN Region AS path length visible: 2.9
Max ARIN Region AS path length visible: 17
Number of ARIN region 32-bit ASNs visible in the Routing Table: 242
Number of ARIN addresses announced to Internet: 209424384
Equivalent to 12 /8s, 123 /16s and 144 /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: 3665
Total RIPE prefixes after maximum aggregation: 2938
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 4261
Unique aggregates announced from the RIPE address blocks: 3602
RIPE Region origin ASes present in the Internet Routing Table: 660
RIPE Prefixes per ASN: 6.46
RIPE Region origin ASes announcing only one prefix: 287
RIPE Region transit ASes present in the Internet Routing Table: 105
Average RIPE Region AS path length visible: 4.6
Max RIPE Region AS path length visible: 15
Number of RIPE region 32-bit ASNs visible in the Routing Table: 151
Number of RIPE addresses announced to Internet: 81551616
Equivalent to 4 /8s, 220 /16s and 97 /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: 1286
Total LACNIC prefixes after maximum aggregation: 493
LACNIC Deaggregation factor: 2.61
Prefixes being announced from the LACNIC address blocks: 1293
Unique aggregates announced from the LACNIC address blocks: 685
LACNIC Region origin ASes present in the Internet Routing Table: 135
LACNIC Prefixes per ASN: 9.58
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: 4.6
Max LACNIC Region AS path length visible: 10
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61
Number of LACNIC addresses announced to Internet: 4611840
Equivalent to 0 /8s, 70 /16s and 95 /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: 1150
Total AfriNIC prefixes after maximum aggregation: 175
AfriNIC Deaggregation factor: 6.57
Prefixes being announced from the AfriNIC address blocks: 1157
Unique aggregates announced from the AfriNIC address blocks: 234
AfriNIC Region origin ASes present in the Internet Routing Table: 53
AfriNIC Prefixes per ASN: 21.83
AfriNIC Region origin ASes announcing only one prefix: 30
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: 21
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 31
Number of AfriNIC addresses announced to Internet: 2635776
Equivalent to 0 /8s, 40 /16s and 56 /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 453 180 24 CSTNET-AS-AP Computer Network Information
1237 194 74 146 KREONET-AS-KR KISTI, KR
4538 193 4192 72 ERX-CERNET-BKB China Education and Resear
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 174 282 117 AARNET-AS-AP Australian Academic and Rese
55824 146 19 20 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/PacWave/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 5099 4938 2424 AMAZON-02, US
396982 2956 3650 467 GOOGLE-CLOUD-PLATFORM, US
714 1172 4392 5 APPLE-ENGINEERING, US
14618 1042 4447 801 AMAZON-AES, US
15169 964 2012 76 GOOGLE, US
8075 754 16020 635 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 543 507 99 CENIC-2152, US
2920 222 44 49 LACOE, US
668 212 647 180 DNIC-AS-00668, US
376 200 162 150 RISQ-AS, CA
Complete listing at https://bgp.nsrc.org/REN/PacWave/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
786 197 1750 189 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 107 24 5 ISU Internet Services Unit ISU, SA
1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL
8987 91 244 66 AMAZON EXPANSION, IE
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
3267 79 29 69 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/PacWave/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
2715 52 100 36 Fundacao Carlos Chagas Filho de Amparo a
61468 52 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/PacWave/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 553 82 3 KENET-AS, KE
2018 373 318 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 9 6 3 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 5099 4938 2424 AMAZON-02, US
396982 2956 3650 467 GOOGLE-CLOUD-PLATFORM, US
714 1172 4392 5 APPLE-ENGINEERING, US
14618 1042 4447 801 AMAZON-AES, US
15169 964 2012 76 GOOGLE, US
8075 754 16020 635 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 624 2170 464 SINET-AS Research Organization of Informa
36914 553 82 3 KENET-AS, KE
2152 543 507 99 CENIC-2152, US
7497 453 180 24 CSTNET-AS-AP Computer Network Information
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
396982 2956 2489 GOOGLE-CLOUD-PLATFORM, US
714 1172 1167 APPLE-ENGINEERING, US
15169 964 888 GOOGLE, US
36914 553 550 KENET-AS, KE
2152 543 444 CENIC-2152, US
7497 453 429 CSTNET-AS-AP Computer Network Information Cente
2018 373 304 TENET-1, ZA
14618 1042 241 AMAZON-AES, US
5786 198 197 UPRENET, PR
1916 236 195 Rede Nacional de Ensino e Pesquisa, BR
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
65208 PRIVATE 63.225.1.0/24 11570 AS11570, US
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
65208 PRIVATE 206.206.156.0/22 11570 AS11570, US
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
64.186.3.0/24 Origin: 16509 AMAZON-02, US
64.186.3.0/24 Transit: 101 WASH-NSF-AS, US
103.165.160.0/24 Origin: 16509 AMAZON-02, US
103.165.160.0/24 Transit: 101 WASH-NSF-AS, US
103.177.50.0/23 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US
103.177.50.0/23 Transit: 15169 GOOGLE, US
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
192.225.212.0/24 Origin: 14618 AMAZON-AES, US
192.225.212.0/24 Transit: 16509 AMAZON-02, US
Complete listing at https://bgp.nsrc.org/REN/PacWave/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 /8:1 /9:3 /10:3 /11:11 /12:38
/13:53 /14:117 /15:234 /16:2424 /17:617 /18:607
/19:881 /20:3047 /21:1557 /22:2270 /23:2496 /24:18003
/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 836 5099 AMAZON-02, US
36914 529 553 KENET-AS, KE
14618 326 1042 AMAZON-AES, US
396982 275 2956 GOOGLE-CLOUD-PLATFORM, US
15169 272 964 GOOGLE, US
8075 139 754 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 104 107 ISU Internet Services Unit ISU, SA
2152 63 543 CENIC-2152, US
23024 38 99 OCDE, US
3267 35 79 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:3 2:2 3:280 4:2 5:27 6:4
8:28 12:2 13:155 14:93 15:138 16:132
17:313 18:328 20:14 23:130 24:3 31:6
34:24 35:99 36:1 37:11 38:12 40:6
41:224 42:18 43:2 44:4 45:91 46:13
47:1 49:8 50:13 52:850 54:178 57:14
58:16 59:20 60:6 61:3 62:16 63:46
64:183 65:44 66:124 67:77 68:25 69:72
70:31 71:26 72:22 74:164 75:1 76:43
77:12 78:3 79:10 80:14 81:25 82:7
83:9 84:9 85:58 86:6 87:6 88:1
89:23 91:57 92:9 93:46 94:8 95:2
96:7 97:2 98:15 99:74 101:4 102:15
103:431 104:275 107:42 108:169 109:8 111:22
113:5 114:32 115:1 116:14 117:67 118:34
119:30 121:29 122:11 123:8 124:42 125:5
128:58 129:47 130:171 131:80 132:68 133:157
134:112 135:10 136:313 137:124 138:23 139:27
140:49 141:18 142:334 143:42 144:70 145:9
146:141 147:82 148:212 149:18 150:77 151:54
152:153 153:15 154:45 155:134 156:133 157:41
158:42 159:174 160:40 161:55 162:114 163:79
164:32 165:85 166:5 167:43 168:170 169:15
170:147 171:1 172:136 173:127 174:2 175:16
176:6 177:5 178:3 179:13 180:16 181:1
182:12 184:9 185:152 186:3 187:26 188:20
189:3 190:17 191:13 192:1728 193:337 194:143
195:82 196:146 197:336 198:641 199:413 200:298
201:39 202:662 203:470 204:467 205:219 206:258
207:359 208:176 209:281 210:225 211:4 212:136
213:23 214:10 216:263 217:27 218:23 219:6
220:17 222:4 223:16
End of report
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