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 08 May, 2021
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 857788
Prefixes after maximum aggregation (per Origin AS): 324705
Deaggregation factor: 2.64
Unique aggregates announced (without unneeded subnets): 407262
Total ASes present in the Internet Routing Table: 71214
Prefixes per ASN: 12.05
Origin-only ASes present in the Internet Routing Table: 61232
Origin ASes announcing only one prefix: 25265
Transit ASes present in the Internet Routing Table:9982
Transit-only ASes present in the Internet Routing Table:323
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 31
Max AS path prepend of ASN (206999) 29
Prefixes from unregistered ASNs in the Routing Table: 1076
Number of instances of unregistered ASNs: 1083
Number of 32-bit ASNs allocated by the RIRs: 35977
Number of 32-bit ASNs visible in the Routing Table: 29920
Prefixes from 32-bit ASNs in the Routing Table: 139163
Number of bogon 32-bit ASNs visible in the Routing Table:24
Special use prefixes present in the Routing Table:1
Prefixes being announced from unallocated address space:567
Number of addresses announced to Internet: 3030129536
Equivalent to 180 /8s, 156 /16s and 27 /24s
Percentage of available address space announced: 81.8
Percentage of allocated address space announced: 81.8
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: 290936
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 226816
Total APNIC prefixes after maximum aggregation: 65462
APNIC Deaggregation factor:3.46
Prefixes being announced from the APNIC address blocks: 222971
Unique aggregates announced from the APNIC address blocks:89686
APNIC Region origin ASes present in the Internet Routing Table: 11571
APNIC Prefixes per ASN: 19.27
APNIC Region origin ASes announcing only one prefix: 3319
APNIC Region transit ASes present in the Internet Routing Table: 1639
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: 6727
Number of APNIC addresses announced to Internet: 772779264
Equivalent to 46 /8s, 15 /16s and 173 /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:247094
Total ARIN prefixes after maximum aggregation: 113150
ARIN Deaggregation factor: 2.18
Prefixes being announced from the ARIN address blocks: 247473
Unique aggregates announced from the ARIN address blocks:118039
ARIN Region origin ASes present in the Internet Routing Table:18804
ARIN Prefixes per ASN:13.16
ARIN Regio
