[REN-BGP-stats-all] IPv4 R&E Routing Table Report - CERNET (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sat Oct 28 20:10:37 UTC 2023
IPv4 R&E Routing Table Report 20:10 GMT Sat 28 Oct, 2023
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: 6366
Prefixes after maximum aggregation (per Origin AS): 4141
Deaggregation factor: 1.54
Unique aggregates announced (without unneeded subnets): 4603
Number of IPv4 prefixes with a valid ROA: 2276
Number of IPv4 prefixes with an invalid ROA: 8
Number of IPv4 prefixes with no ROA: 4082
Total ASes present in the Internet Routing Table: 977
Prefixes per ASN: 6.52
Origin-only ASes present in the Internet Routing Table: 839
Origin ASes announcing only one prefix: 418
Transit ASes present in the Internet Routing Table: 138
Transit-only ASes present in the Internet Routing Table: 44
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 5.4
Max AS path length visible: 15
Max AS path prepend of ASN ( 20537) 9
Prefixes from unregistered ASNs in the Routing Table: 0
Number of instances of unregistered ASNs: 0
Number of 32-bit ASNs allocated by the RIRs: 42941
Number of 32-bit ASNs visible in the Routing Table: 298
Prefixes from 32-bit ASNs in the Routing Table: 730
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: 86390784
Equivalent to 5 /8s, 38 /16s and 56 /24s
Percentage of available address space announced: 2.3
Percentage of allocated address space announced: 2.3
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: 402
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 3755
Total APNIC prefixes after maximum aggregation: 1994
APNIC Deaggregation factor: 1.88
Prefixes being announced from the APNIC address blocks: 3755
Unique aggregates announced from the APNIC address blocks: 2361
APNIC Region origin ASes present in the Internet Routing Table: 470
APNIC Prefixes per ASN: 7.99
APNIC Region origin ASes announcing only one prefix: 209
APNIC Region transit ASes present in the Internet Routing Table: 46
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 12
Number of APNIC region 32-bit ASNs visible in the Routing Table: 191
Number of APNIC addresses announced to Internet: 42976256
Equivalent to 2 /8s, 143 /16s and 196 /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: 83
Total ARIN prefixes after maximum aggregation: 35
ARIN Deaggregation factor: 2.37
Prefixes being announced from the ARIN address blocks: 89
Unique aggregates announced from the ARIN address blocks: 43
ARIN Region origin ASes present in the Internet Routing Table: 15
ARIN Prefixes per ASN: 5.93
ARIN Region origin ASes announcing only one prefix: 5
ARIN Region transit ASes present in the Internet Routing Table: 7
Average ARIN Region AS path length visible: 6.9
Max ARIN Region AS path length visible: 14
Number of ARIN region 32-bit ASNs visible in the Routing Table: 1
Number of ARIN addresses announced to Internet: 462848
Equivalent to 0 /8s, 7 /16s and 16 /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, 393216-401308
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, 47/8, 48/8, 50/8, 52/8, 53/8,
54/8, 55/8, 56/8, 57/8, 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: 2470
Total RIPE prefixes after maximum aggregation: 2100
RIPE Deaggregation factor: 1.18
Prefixes being announced from the RIPE address blocks: 2461
Unique aggregates announced from the RIPE address blocks: 2169
RIPE Region origin ASes present in the Internet Routing Table: 444
RIPE Prefixes per ASN: 5.54
RIPE Region origin ASes announcing only one prefix: 202
RIPE Region transit ASes present in the Internet Routing Table: 72
Average RIPE Region AS path length visible: 6.8
Max RIPE Region AS path length visible: 15
Number of RIPE region 32-bit ASNs visible in the Routing Table: 106
Number of RIPE addresses announced to Internet: 42870784
Equivalent to 2 /8s, 142 /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,
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: 2
Total LACNIC prefixes after maximum aggregation: 2
LACNIC Deaggregation factor: 1.00
Prefixes being announced from the LACNIC address blocks: 2
Unique aggregates announced from the LACNIC address blocks: 2
LACNIC Region origin ASes present in the Internet Routing Table: 2
LACNIC Prefixes per ASN: 1.00
LACNIC Region origin ASes announcing only one prefix: 2
LACNIC Region transit ASes present in the Internet Routing Table: 0
Average LACNIC Region AS path length visible: 8.0
Max LACNIC Region AS path length visible: 8
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 512
Equivalent to 0 /8s, 0 /16s and 2 /24s
LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 64099-64197, 262144-273820 + 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: 56
Total AfriNIC prefixes after maximum aggregation: 10
AfriNIC Deaggregation factor: 5.60
Prefixes being announced from the AfriNIC address blocks: 56
Unique aggregates announced from the AfriNIC address blocks: 25
AfriNIC Region origin ASes present in the Internet Routing Table: 2
AfriNIC Prefixes per ASN: 28.00
AfriNIC Region origin ASes announcing only one prefix: 0
AfriNIC Region transit ASes present in the Internet Routing Table: 0
Average AfriNIC Region AS path length visible: 6.0
Max AfriNIC Region AS path length visible: 6
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 14336
Equivalent to 0 /8s, 0 /16s and 56 /24s
AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks 41/8, 45/8, 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 592 2146 465 SINET-AS Research Organization of Infor
1237 193 74 142 KREONET-AS-KR KISTI, KR
58647 177 18 2 KAGAWAU-AS Kagawa University, JP
7575 175 329 120 AARNET-AS-AP Australian Academic and Re
55824 126 19 17 NKN-CORE-NW NKN Core Network, IN
4538 112 4176 70 ERX-CERNET-BKB China Education and Rese
4621 70 37 10 UNINET-AS-AP UNINET-, TH
9411 66 16 2 NONTRINET-AS-AP Kasetsart University, T
4762 64 4 1 MAHIDOL-BORDER-AS Mahidol University, T
23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR
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
6360 53 62 9 UNIVHAWAII, US
5653 7 0 6 UCSF, US
26100 3 1 3 NOAA-PACIFIC-REGION-CENTER, US
36599 3 0 2 SOFTETHER-AMERICA, US
112 2 0 2 RESERVED, ZZ
195 2 4 1 SDSC-AS, US
11570 2 0 2 EASTERN-NEW-MEXICO-UNIVERITY, US
15318 2 12 2 MCGILL-AS, CA
20144 2 0 1 IMRS, US
396690 2 0 2 VRSN-AC50-340, 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
680 279 1855 245 DFN Verein zur Foerderung eines Deutsch
786 179 1687 176 JANET Jisc Services Limited, GB
559 113 533 105 SWITCH Peering requests: peering at switch
2614 93 27 73 ROEDUNET, RO
137 80 676 75 ASGARR Consortium GARR, IT
553 73 457 73 BELWUE BelWue-Koordination, DE
2200 64 599 59 FR-RENATER Reseau National de telecommu
1930 63 81 58 RCCN Fundacao para a Ciencia e a Tecnol
200521 50 4 30 SEAP-AGE, ES
5408 39 60 26 GR-NET www.grnet.gr, GR
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
10906 1 0 1 Nucleo de Inf. e Coord. do Ponto BR - N
14650 1 0 1 Nucleo de Inf. e Coord. do Ponto BR - N
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
3208 32 2 1 ARN, DZ
6879 24 2 9 ENSTINET-, EG
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 592 2146 465 SINET-AS Research Organization of Infor
680 279 1855 245 DFN Verein zur Foerderung eines Deutsch
1237 193 74 142 KREONET-AS-KR KISTI, KR
786 179 1687 176 JANET Jisc Services Limited, GB
58647 177 18 2 KAGAWAU-AS Kagawa University, JP
7575 175 329 120 AARNET-AS-AP Australian Academic and Re
55824 126 19 17 NKN-CORE-NW NKN Core Network, IN
559 113 533 105 SWITCH Peering requests: peering at switch
4538 112 4176 70 ERX-CERNET-BKB China Education and Rese
2614 93 27 73 ROEDUNET, RO
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
58647 177 175 KAGAWAU-AS Kagawa University, JP
55824 126 109 NKN-CORE-NW NKN Core Network, IN
9411 66 64 NONTRINET-AS-AP Kasetsart University, Thailand,
4762 64 63 MAHIDOL-BORDER-AS Mahidol University, Thailand,
4621 70 60 UNINET-AS-AP UNINET-, TH
7575 175 55 AARNET-AS-AP Australian Academic and Research N
1237 193 51 KREONET-AS-KR KISTI, KR
23570 59 48 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR
38280 50 48 MONASHUNI-MY-AS-AP Monash University Sunway Cam
9317 49 48 ITISNET-AS INHA UNIVERSITY, KR
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-CIDRnet
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
134.208.0.0/16 Origin: 1659 ERX-TANET-ASN1 Taiwan Academic Network T
134.208.0.0/16 Transit: 9264 ASNET Academia Sinica, TW
192.31.196.0/24 Origin: 112 RESERVED, ZZ
192.31.196.0/24 Transit: 7500 M-ROOT-DNS WIDE Project, JP
202.58.231.0/24 Origin: 134096 EHEALTHNSW-AS-AP eHealth NSW, AU
202.58.231.0/24 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 /9:0 /10:0 /11:1 /12:7
/13:14 /14:20 /15:85 /16:864 /17:112 /18:100
/19:171 /20:217 /21:310 /22:619 /23:554 /24:3292
/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
200521 30 50 SEAP-AGE, ES
31638 21 21 ASN-LEPIDA, IT
3233 20 30 ICI-ROTLD Romanian National R&D Network, RO
2614 16 93 ROEDUNET, RO
28949 15 15 TUSNET-AS 8, Kliment Ohridski St., BG
60187 14 35 LGFL-AS, GB
5408 13 39 GR-NET www.grnet.gr, GR
50837 12 13 CLOUDSIGMA-AS, CH
8501 8 8 PIONIER-AS PIONIER, National Research and Educa
20545 8 10 GRENA-AS Tbilisi, Georgia, GE
Complete listing at https://bgp.nsrc.org/REN/CERNET/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:1 5:15 14:88 24:2 31:7 44:3
45:20 46:5 49:5 59:18 61:3 62:6
63:1 64:7 74:3 77:3 78:3 79:8
80:7 81:26 82:3 83:6 84:2 85:22
89:7 91:28 93:3 94:4 95:2 103:257
109:5 111:16 114:23 116:6 117:61 118:32
121:18 122:8 123:8 128:35 129:4 130:4
131:12 132:6 133:152 134:32 137:5 138:8
140:3 143:6 144:22 145:2 146:1 147:8
148:6 150:22 151:2 152:3 153:6 155:5
156:7 157:2 158:29 159:1 160:26 161:5
163:4 165:38 168:7 175:18 180:14 185:36
188:10 192:492 193:247 194:82 195:66 196:6
199:1 200:2 202:502 203:409 205:2 210:115
211:14 212:36 213:1 217:9 218:3 219:5
220:16 222:1
End of report
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