This is an automated weekly mailing describing the state of the Global
IPv4 Routing Table as seen from APNIC's router in Japan.
The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG
TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG.
Daily listings are sent to bgp-st...@lists.apnic.net.
For historical data, please see https://thyme.apnic.net.
If you have any comments please contact Philip Smith .
IPv4 Routing Table Report 04:00 +10GMT Sat 20 May, 2023
BGP Table (Global) as seen in Japan.
Report Website: https://thyme.apnic.net
Detailed Analysis: https://thyme.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 924080
Prefixes after maximum aggregation (per Origin AS): 349822
Deaggregation factor: 2.64
Unique aggregates announced (without unneeded subnets): 449331
Total ASes present in the Internet Routing Table: 74455
Prefixes per ASN: 12.41
Origin-only ASes present in the Internet Routing Table: 63908
Origin ASes announcing only one prefix: 26264
Transit ASes present in the Internet Routing Table: 10547
Transit-only ASes present in the Internet Routing Table:432
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 55
Max AS path prepend of ASN (265020) 50
Prefixes from unregistered ASNs in the Routing Table: 1074
Number of instances of unregistered ASNs: 1075
Number of 32-bit ASNs allocated by the RIRs: 41898
Number of 32-bit ASNs visible in the Routing Table: 34608
Prefixes from 32-bit ASNs in the Routing Table: 171767
Number of bogon 32-bit ASNs visible in the Routing Table:15
Special use prefixes present in the Routing Table:1
Prefixes being announced from unallocated address space:622
Number of addresses announced to Internet: 3057966848
Equivalent to 182 /8s, 68 /16s and 223 /24s
Percentage of available address space announced: 82.6
Percentage of allocated address space announced: 82.6
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: 308506
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 245522
Total APNIC prefixes after maximum aggregation: 69449
APNIC Deaggregation factor:3.54
Prefixes being announced from the APNIC address blocks: 239730
Unique aggregates announced from the APNIC address blocks:98339
APNIC Region origin ASes present in the Internet Routing Table: 13441
APNIC Prefixes per ASN: 17.84
APNIC Region origin ASes announcing only one prefix: 3959
APNIC Region transit ASes present in the Internet Routing Table: 1799
Average APNIC Region AS path length visible:4.5
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 8741
Number of APNIC addresses announced to Internet: 773621376
Equivalent to 46 /8s, 28 /16s and 134 /24s
APNIC AS Blocks4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 63488-64098, 64297-64395, 131072-151865
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:269926
Total ARIN prefixes after maximum aggregation: 122680
ARIN Deaggregation factor: 2.20
Prefixes being announced from the ARIN address blocks: 272754
Unique aggregates announced from the ARIN address blocks:130386
ARIN Region origin ASes present in the Internet Routing Table:19115
ARIN Prefixes per ASN:
