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 09 Jan, 2021
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 835914
Prefixes after maximum aggregation (per Origin AS): 320620
Deaggregation factor: 2.61
Unique aggregates announced (without unneeded subnets): 400305
Total ASes present in the Internet Routing Table: 70275
Prefixes per ASN: 11.89
Origin-only ASes present in the Internet Routing Table: 60448
Origin ASes announcing only one prefix: 25023
Transit ASes present in the Internet Routing Table:9827
Transit-only ASes present in the Internet Routing Table:296
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 203
Max AS path prepend of ASN (396896) 200
Prefixes from unregistered ASNs in the Routing Table: 1015
Number of instances of unregistered ASNs: 1018
Number of 32-bit ASNs allocated by the RIRs: 34613
Number of 32-bit ASNs visible in the Routing Table: 28766
Prefixes from 32-bit ASNs in the Routing Table: 132847
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:501
Number of addresses announced to Internet: 2864181632
Equivalent to 170 /8s, 183 /16s and 241 /24s
Percentage of available address space announced: 77.4
Percentage of allocated address space announced: 77.4
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: 284376
APNIC Region Analysis Summary
-
Prefixes being announced by APNIC Region ASes: 218915
Total APNIC prefixes after maximum aggregation: 64842
APNIC Deaggregation factor:3.38
Prefixes being announced from the APNIC address blocks: 214864
Unique aggregates announced from the APNIC address blocks:87855
APNIC Region origin ASes present in the Internet Routing Table: 11192
APNIC Prefixes per ASN: 19.20
APNIC Region origin ASes announcing only one prefix: 3195
APNIC Region transit ASes present in the Internet Routing Table: 1604
Average APNIC Region AS path length visible:4.5
Max APNIC Region AS path length visible: 31
Number of APNIC region 32-bit ASNs visible in the Routing Table: 6324
Number of APNIC addresses announced to Internet: 778374912
Equivalent to 46 /8s, 101 /16s and 15 /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:241300
Total ARIN prefixes after maximum aggregation: 111690
ARIN Deaggregation factor: 2.16
Prefixes being announced from the ARIN address blocks: 241836
Unique aggregates announced from the ARIN address blocks:115697
ARIN Region origin ASes present in the Internet Routing Table:18696
ARIN Prefixes per ASN:12.94
ARIN Regi
