This is an automated weekly mailing describing the state of the Internet
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 http://thyme.rand.apnic.net.
If you have any comments please contact Philip Smith .
Routing Table Report 04:00 +10GMT Sat 17 Apr, 2021
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 856506
Prefixes after maximum aggregation (per Origin AS): 324269
Deaggregation factor: 2.64
Unique aggregates announced (without unneeded subnets): 406158
Total ASes present in the Internet Routing Table: 71094
Prefixes per ASN: 12.05
Origin-only ASes present in the Internet Routing Table: 61156
Origin ASes announcing only one prefix: 25289
Transit ASes present in the Internet Routing Table:9938
Transit-only ASes present in the Internet Routing Table:311
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 38
Max AS path prepend of ASN ( 37385) 33
Prefixes from unregistered ASNs in the Routing Table: 1009
Number of instances of unregistered ASNs: 1016
Number of 32-bit ASNs allocated by the RIRs: 35730
Number of 32-bit ASNs visible in the Routing Table: 29751
Prefixes from 32-bit ASNs in the Routing Table: 138298
Number of bogon 32-bit ASNs visible in the Routing Table:22
Special use prefixes present in the Routing Table:1
Prefixes being announced from unallocated address space:522
Number of addresses announced to Internet: 2948654208
Equivalent to 175 /8s, 192 /16s and 228 /24s
Percentage of available address space announced: 79.6
Percentage of allocated address space announced: 79.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 99.5
Total number of prefixes smaller than registry allocations: 290756
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 226747
Total APNIC prefixes after maximum aggregation: 65533
APNIC Deaggregation factor:3.46
Prefixes being announced from the APNIC address blocks: 222874
Unique aggregates announced from the APNIC address blocks:89504
APNIC Region origin ASes present in the Internet Routing Table: 11485
APNIC Prefixes per ASN: 19.41
APNIC Region origin ASes announcing only one prefix: 3285
APNIC Region transit ASes present in the Internet Routing Table: 1637
Average APNIC Region AS path length visible:4.6
Max APNIC Region AS path length visible: 30
Number of APNIC region 32-bit ASNs visible in the Routing Table: 6646
Number of APNIC addresses announced to Internet: 771967232
Equivalent to 46 /8s, 3 /16s and 73 /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, 131072-143673
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:245811
Total ARIN prefixes after maximum aggregation: 112965
ARIN Deaggregation factor: 2.18
Prefixes being announced from the ARIN address blocks: 246236
Unique aggregates announced from the ARIN address blocks:117767
ARIN Region origin ASes present in the Internet Routing Table:18794
ARIN Prefixes per ASN:13.10
ARIN
