[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Mon Mar 31 22:35:51 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Mon 31 Mar, 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: 32328
Prefixes after maximum aggregation (per Origin AS): 15636
Deaggregation factor: 2.07
Unique aggregates announced (without unneeded subnets): 18682
Total ASes present in the Internet Routing Table: 2871
Prefixes per ASN: 11.26
Origin-only ASes present in the Internet Routing Table: 2494
Origin ASes announcing only one prefix: 1096
Transit ASes present in the Internet Routing Table: 377
Transit-only ASes present in the Internet Routing Table: 62
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: 4
Number of instances of unregistered ASNs: 4
Number of 32-bit ASNs allocated by the RIRs: 46117
Number of 32-bit ASNs visible in the Routing Table: 724
Prefixes from 32-bit ASNs in the Routing Table: 5025
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: 345242112
Equivalent to 20 /8s, 147 /16s and 250 /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: 4261
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4919
Total APNIC prefixes after maximum aggregation: 2337
APNIC Deaggregation factor: 2.10
Prefixes being announced from the APNIC address blocks: 5146
Unique aggregates announced from the APNIC address blocks: 2909
APNIC Region origin ASes present in the Internet Routing Table: 604
APNIC Prefixes per ASN: 8.52
APNIC Region origin ASes announcing only one prefix: 249
APNIC Region transit ASes present in the Internet Routing Table: 52
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 14
Number of APNIC region 32-bit ASNs visible in the Routing Table: 245
Number of APNIC addresses announced to Internet: 47364352
Equivalent to 2 /8s, 210 /16s and 185 /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: 21297
Total ARIN prefixes after maximum aggregation: 9708
ARIN Deaggregation factor: 2.19
Prefixes being announced from the ARIN address blocks: 20476
Unique aggregates announced from the ARIN address blocks: 11241
ARIN Region origin ASes present in the Internet Routing Table: 1363
ARIN Prefixes per ASN: 15.02
ARIN Region origin ASes announcing only one prefix: 476
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: 239
Number of ARIN addresses announced to Internet: 209476352
Equivalent to 12 /8s, 124 /16s and 91 /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: 3715
Total RIPE prefixes after maximum aggregation: 2952
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 4289
Unique aggregates announced from the RIPE address blocks: 3631
RIPE Region origin ASes present in the Internet Routing Table: 660
RIPE Prefixes per ASN: 6.50
RIPE Region origin ASes announcing only one prefix: 286
RIPE Region transit ASes present in the Internet Routing Table: 104
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: 153
Number of RIPE addresses announced to Internet: 81494528
Equivalent to 4 /8s, 219 /16s and 130 /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: 1251
Total LACNIC prefixes after maximum aggregation: 462
LACNIC Deaggregation factor: 2.71
Prefixes being announced from the LACNIC address blocks: 1258
Unique aggregates announced from the LACNIC address blocks: 660
LACNIC Region origin ASes present in the Internet Routing Table: 130
LACNIC Prefixes per ASN: 9.68
LACNIC Region origin ASes announcing only one prefix: 56
LACNIC Region transit ASes present in the Internet Routing Table: 22
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: 59
Number of LACNIC addresses announced to Internet: 4356352
Equivalent to 0 /8s, 66 /16s and 121 /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: 1142
Total AfriNIC prefixes after maximum aggregation: 173
AfriNIC Deaggregation factor: 6.60
Prefixes being announced from the AfriNIC address blocks: 1149
Unique aggregates announced from the AfriNIC address blocks: 231
AfriNIC Region origin ASes present in the Internet Routing Table: 50
AfriNIC Prefixes per ASN: 22.98
AfriNIC Region origin ASes announcing only one prefix: 29
AfriNIC Region transit ASes present in the Internet Routing Table: 11
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: 28
Number of AfriNIC addresses announced to Internet: 2545920
Equivalent to 0 /8s, 38 /16s and 217 /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
4538 195 4192 73 ERX-CERNET-BKB China Education and Resear
1237 194 74 146 KREONET-AS-KR KISTI, KR
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 174 297 117 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
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 5084 4934 2396 AMAZON-02, US
396982 2946 3649 463 GOOGLE-CLOUD-PLATFORM, US
714 1152 4392 5 APPLE-ENGINEERING, US
14618 1035 4446 795 AMAZON-AES, US
15169 946 2012 73 GOOGLE, US
8075 737 16019 619 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 535 507 99 CENIC-2152, US
2920 226 44 49 LACOE, US
668 212 647 180 DNIC-AS-00668, US
376 201 162 151 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
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
786 196 1750 188 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 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 157 10 69 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 545 82 3 KENET-AS, KE
2018 374 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 13 8 5 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
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 5084 4934 2396 AMAZON-02, US
396982 2946 3649 463 GOOGLE-CLOUD-PLATFORM, US
714 1152 4392 5 APPLE-ENGINEERING, US
14618 1035 4446 795 AMAZON-AES, US
15169 946 2012 73 GOOGLE, US
8075 737 16019 619 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 624 2170 464 SINET-AS Research Organization of Informa
36914 545 82 3 KENET-AS, KE
2152 535 507 99 CENIC-2152, US
7497 452 180 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 2946 2483 GOOGLE-CLOUD-PLATFORM, US
714 1152 1147 APPLE-ENGINEERING, US
15169 946 873 GOOGLE, US
36914 545 542 KENET-AS, KE
2152 535 436 CENIC-2152, US
7497 452 428 CSTNET-AS-AP Computer Network Information Cente
2018 374 305 TENET-1, ZA
14618 1035 240 AMAZON-AES, US
5786 199 198 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
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
65208 PRIVATE 206.206.156.0/22 11570 AS11570, US
65208 PRIVATE 216.161.32.0/23 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 /16:2422 /17:614 /18:601
/19:870 /20:3037 /21:1551 /22:2263 /23:2471 /24:18039
/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 833 5084 AMAZON-02, US
36914 521 545 KENET-AS, KE
14618 325 1035 AMAZON-AES, US
396982 272 2946 GOOGLE-CLOUD-PLATFORM, US
15169 269 946 GOOGLE, US
8075 136 737 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 105 108 ISU Internet Services Unit ISU, SA
2152 63 535 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 2:1 3:274 4:2 5:26 6:4
8:28 12:2 13:162 14:93 15:140 16:132
17:307 18:324 23:129 24:3 31:6 34:24
35:98 36:1 37:9 38:11 40:6 41:219
42:18 43:2 44:4 45:88 46:13 47:1
49:8 50:13 52:854 54:178 57:14 58:16
59:20 60:6 61:3 62:16 63:46 64:183
65:44 66:123 67:77 68:25 69:71 70:35
71:31 72:22 74:165 75:1 76:43 77:12
78:3 79:10 80:14 81:25 82:7 83:9
84:9 85:57 86:6 87:6 88:1 89:23
91:59 92:9 93:46 94:8 95:2 96:7
97:1 98:15 99:76 101:4 102:14 103:433
104:274 107:42 108:170 109:8 111:22 113:5
114:32 115:1 116:14 117:67 118:34 119:30
121:29 122:11 123:8 124:42 125:5 128:59
129:47 130:172 131:81 132:66 133:157 134:113
135:9 136:314 137:122 138:71 139:27 140:49
141:18 142:331 143:41 144:70 145:9 146:141
147:82 148:210 149:18 150:77 151:54 152:153
153:15 154:47 155:133 156:135 157:41 158:43
159:166 160:40 161:55 162:115 163:77 164:31
165:84 166:5 167:43 168:170 169:14 170:149
171:1 172:132 173:126 174:2 175:16 176:6
177:7 178:3 179:14 180:16 181:1 182:12
184:10 185:154 186:3 187:24 188:20 189:3
190:17 191:13 192:1724 193:332 194:143 195:90
196:149 197:333 198:654 199:411 200:290 201:39
202:664 203:470 204:466 205:223 206:255 207:361
208:174 209:279 210:225 211:4 212:159 213:22
214:10 216:263 217:26 218:23 219:6 220:17
222:4 223:15
End of report
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