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 04 Sep, 2021
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 861383
Prefixes after maximum aggregation (per Origin AS): 325835
Deaggregation factor: 2.64
Unique aggregates announced (without unneeded subnets): 413595
Total ASes present in the Internet Routing Table: 71886
Prefixes per ASN: 11.98
Origin-only ASes present in the Internet Routing Table: 61764
Origin ASes announcing only one prefix: 25516
Transit ASes present in the Internet Routing Table: 10122
Transit-only ASes present in the Internet Routing Table:327
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 37
Max AS path prepend of ASN (141827) 33
Prefixes from unregistered ASNs in the Routing Table: 1198
Number of instances of unregistered ASNs: 1203
Number of 32-bit ASNs allocated by the RIRs: 37120
Number of 32-bit ASNs visible in the Routing Table: 30836
Prefixes from 32-bit ASNs in the Routing Table: 143295
Number of bogon 32-bit ASNs visible in the Routing Table:26
Special use prefixes present in the Routing Table:1
Prefixes being announced from unallocated address space:474
Number of addresses announced to Internet: 3037773184
Equivalent to 181 /8s, 16 /16s and 189 /24s
Percentage of available address space announced: 82.1
Percentage of allocated address space announced: 82.1
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: 285963
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 231406
Total APNIC prefixes after maximum aggregation: 66017
APNIC Deaggregation factor:3.51
Prefixes being announced from the APNIC address blocks: 226886
Unique aggregates announced from the APNIC address blocks:90889
APNIC Region origin ASes present in the Internet Routing Table: 11911
APNIC Prefixes per ASN: 19.05
APNIC Region origin ASes announcing only one prefix: 3384
APNIC Region transit ASes present in the Internet Routing Table: 1680
Average APNIC Region AS path length visible:4.5
Max APNIC Region AS path length visible: 37
Number of APNIC region 32-bit ASNs visible in the Routing Table: 7061
Number of APNIC addresses announced to Internet: 772799232
Equivalent to 46 /8s, 15 /16s and 251 /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, 131072-147769
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:251706
Total ARIN prefixes after maximum aggregation: 115063
ARIN Deaggregation factor: 2.19
Prefixes being announced from the ARIN address blocks: 251565
Unique aggregates announced from the ARIN address blocks:119692
ARIN Region origin ASes present in the Internet Routing Table:18899
ARIN Prefixes per ASN:13.31
ARIN Regio
