[REN-BGP-stats-all] IPv4 R&E Routing Table Report - CERNET (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Fri Jan 17 20:10:38 UTC 2025
IPv4 R&E Routing Table Report 20:10 GMT Fri 17 Jan, 2025
IPv4 BGP Table (R&E) as seen at CERNET.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/CERNET/
Analysis Summary
----------------
BGP routing table entries examined: 18508
Prefixes after maximum aggregation (per Origin AS): 10354
Deaggregation factor: 1.79
Unique aggregates announced (without unneeded subnets): 11472
Number of IPv4 prefixes with a valid ROA: 7407
Number of IPv4 prefixes with an invalid ROA: 5
Number of IPv4 prefixes with no ROA: 11096
Total ASes present in the Internet Routing Table: 2720
Prefixes per ASN: 6.80
Origin-only ASes present in the Internet Routing Table: 2344
Origin ASes announcing only one prefix: 1049
Transit ASes present in the Internet Routing Table: 376
Transit-only ASes present in the Internet Routing Table: 74
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: 16
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 1
Number of instances of unregistered ASNs: 1
Number of 32-bit ASNs allocated by the RIRs: 46084
Number of 32-bit ASNs visible in the Routing Table: 637
Prefixes from 32-bit ASNs in the Routing Table: 1728
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: 2
Number of addresses announced to Internet: 196675216
Equivalent to 11 /8s, 185 /16s and 6 /24s
Percentage of available address space announced: 5.3
Percentage of allocated address space announced: 5.3
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: 2320
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3999
Total APNIC prefixes after maximum aggregation: 2130
APNIC Deaggregation factor: 1.88
Prefixes being announced from the APNIC address blocks: 3999
Unique aggregates announced from the APNIC address blocks: 2528
APNIC Region origin ASes present in the Internet Routing Table: 549
APNIC Prefixes per ASN: 7.28
APNIC Region origin ASes announcing only one prefix: 238
APNIC Region transit ASes present in the Internet Routing Table: 55
Average APNIC Region AS path length visible: 4.3
Max APNIC Region AS path length visible: 13
Number of APNIC region 32-bit ASNs visible in the Routing Table: 204
Number of APNIC addresses announced to Internet: 44741632
Equivalent to 2 /8s, 170 /16s and 180 /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: 8464
Total ARIN prefixes after maximum aggregation: 4675
ARIN Deaggregation factor: 1.81
Prefixes being announced from the ARIN address blocks: 8477
Unique aggregates announced from the ARIN address blocks: 5142
ARIN Region origin ASes present in the Internet Routing Table: 1256
ARIN Prefixes per ASN: 6.75
ARIN Region origin ASes announcing only one prefix: 453
ARIN Region transit ASes present in the Internet Routing Table: 160
Average ARIN Region AS path length visible: 4.6
Max ARIN Region AS path length visible: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 208
Number of ARIN addresses announced to Internet: 86995200
Equivalent to 5 /8s, 47 /16s and 113 /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: 3565
Total RIPE prefixes after maximum aggregation: 2863
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 3552
Unique aggregates announced from the RIPE address blocks: 2902
RIPE Region origin ASes present in the Internet Routing Table: 660
RIPE Prefixes per ASN: 5.38
RIPE Region origin ASes announcing only one prefix: 293
RIPE Region transit ASes present in the Internet Routing Table: 110
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 13
Number of RIPE region 32-bit ASNs visible in the Routing Table: 154
Number of RIPE addresses announced to Internet: 58453392
Equivalent to 3 /8s, 123 /16s and 237 /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: 1392
Total LACNIC prefixes after maximum aggregation: 538
LACNIC Deaggregation factor: 2.59
Prefixes being announced from the LACNIC address blocks: 1391
Unique aggregates announced from the LACNIC address blocks: 708
LACNIC Region origin ASes present in the Internet Routing Table: 156
LACNIC Prefixes per ASN: 8.92
LACNIC Region origin ASes announcing only one prefix: 55
LACNIC Region transit ASes present in the Internet Routing Table: 23
Average LACNIC Region AS path length visible: 5.2
Max LACNIC Region AS path length visible: 14
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64
Number of LACNIC addresses announced to Internet: 4202752
Equivalent to 0 /8s, 64 /16s and 33 /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: 1087
Total AfriNIC prefixes after maximum aggregation: 147
AfriNIC Deaggregation factor: 7.39
Prefixes being announced from the AfriNIC address blocks: 1087
Unique aggregates announced from the AfriNIC address blocks: 190
AfriNIC Region origin ASes present in the Internet Routing Table: 24
AfriNIC Prefixes per ASN: 45.29
AfriNIC Region origin ASes announcing only one prefix: 10
AfriNIC Region transit ASes present in the Internet Routing Table: 7
Average AfriNIC Region AS path length visible: 3.6
Max AfriNIC Region AS path length visible: 8
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 2281728
Equivalent to 0 /8s, 34 /16s and 209 /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
1237 190 74 146 KREONET-AS-KR KISTI, KR
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 171 297 115 AARNET-AS-AP Australian Academic and Rese
55824 146 19 20 NKN-CORE-NW NKN Core Network, IN
4538 113 4176 70 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
2697 59 4 34 ERX-ERNET-AS Education and Research Netwo
1659 55 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
2152 526 507 99 CENIC-2152, US
2920 226 44 49 LACOE, US
668 205 630 174 DNIC-AS-00668, US
376 201 162 150 RISQ-AS, CA
5786 198 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 129 519 34 NCREN, US
23024 97 7 17 OCDE, US
21976 90 34 16 NJEDGE-NET, US
237 82 541 48 MERIT-AS-14, US
Complete listing at https://bgp.nsrc.org/REN/CERNET/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
786 185 1767 182 JANET Jisc Services Limited, GB
8895 130 24 5 ISU Internet Services Unit ISU, SA
559 114 533 104 SWITCH Peering requests: peering at switch.c
1103 96 1743 83 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 78 29 68 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 159 178 42 Rede Nacional de Ensino e Pesquisa, BR
28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M
11340 109 25 52 Red Universitaria Nacional, CL
271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
61468 52 5 17 CEDIA, EC
2715 49 99 35 Fundacao Carlos Chagas Filho de Amparo a
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
4270 46 16 1 Red de Interconexion Universitaria, AR
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 542 82 3 KENET-AS, KE
2018 379 319 71 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 32 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
36982 8 33 8 UCT, ZA
37182 7 0 7 TERNET, TZ
37654 6 0 5 RwEdNet-AS, RW
Complete listing at https://bgp.nsrc.org/REN/CERNET/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 542 82 3 KENET-AS, KE
2152 526 507 99 CENIC-2152, US
2018 379 319 71 TENET-1, ZA
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
2920 226 44 49 LACOE, US
668 205 630 174 DNIC-AS-00668, US
376 201 162 150 RISQ-AS, CA
5786 198 16 1 UPRENET, PR
1237 190 74 146 KREONET-AS-KR KISTI, KR
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 542 539 KENET-AS, KE
2152 526 427 CENIC-2152, US
2018 379 308 TENET-1, ZA
5786 198 197 UPRENET, PR
58647 182 180 KAGAWAU-AS Kagawa University, JP
2920 226 177 LACOE, US
18558 140 135 NETBLK-RCOEK, US
55824 146 126 NKN-CORE-NW NKN Core Network, IN
8895 130 125 ISU Internet Services Unit ISU, SA
1916 159 117 Rede Nacional de Ensino e Pesquisa, BR
Complete listing at https://bgp.nsrc.org/REN/CERNET/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
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
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/CERNET/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
/13:18 /14:31 /15:114 /16:1949 /17:409 /18:449
/19:549 /20:815 /21:846 /22:1419 /23:1469 /24:10421
/25:3 /26:1 /27:0 /28:1 /29:0 /30:0
/31:0 /32:0
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
36914 518 542 KENET-AS, KE
8895 125 130 ISU Internet Services Unit ISU, SA
2152 62 526 CENIC-2152, US
23024 36 97 OCDE, US
3267 34 78 NIKS, RU
32440 33 58 LONI, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
200521 31 55 SEAP-AGE, ES
25977 30 44 HCCS, US
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:15 6:4 8:2 12:2 14:93
23:8 24:3 31:1 35:3 37:8 38:11
41:223 42:5 44:4 45:50 46:4 47:1
49:10 50:4 52:1 59:18 61:3 62:8
63:36 64:43 65:5 66:58 67:41 68:13
69:18 70:2 71:1 72:7 74:55 76:38
77:10 78:3 79:10 80:12 81:25 82:7
83:7 84:8 85:45 86:5 87:1 89:10
91:41 92:2 93:13 94:2 95:2 96:5
97:1 98:2 102:2 103:297 104:80 107:2
108:8 109:5 111:20 113:1 114:24 116:9
117:5 118:33 119:1 121:18 122:8 123:8
125:5 128:59 129:36 130:97 131:66 132:66
133:155 134:107 136:198 137:98 138:58 139:5
140:31 141:3 142:40 143:25 144:26 145:2
146:136 147:66 148:199 149:13 150:70 151:9
152:132 153:14 154:34 155:64 156:130 157:26
158:29 159:20 160:33 161:17 162:23 163:64
164:11 165:49 167:26 168:118 169:7 170:96
171:1 172:2 173:7 175:16 177:6 179:9
180:15 181:1 182:11 184:3 185:49 186:3
187:22 188:14 189:3 190:34 191:13 192:1343
193:269 194:132 195:80 196:144 197:328 198:533
199:270 200:268 201:37 202:575 203:435 204:389
205:178 206:214 207:312 208:67 209:160 210:139
211:3 212:164 213:6 214:9 216:93 217:12
218:23 219:6 220:16 222:1 223:11
End of report
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