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 27 Mar, 2021
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 853765
Prefixes after maximum aggregation (per Origin AS): 323350
Deaggregation factor: 2.64
Unique aggregates announced (without unneeded subnets): 405865
Total ASes present in the Internet Routing Table: 70923
Prefixes per ASN: 12.04
Origin-only ASes present in the Internet Routing Table: 61009
Origin ASes announcing only one prefix: 25176
Transit ASes present in the Internet Routing Table:9914
Transit-only ASes present in the Internet Routing Table:307
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 38
Max AS path prepend of ASN ( 37385) 33
Prefixes from unregistered ASNs in the Routing Table: 971
Number of instances of unregistered ASNs: 975
Number of 32-bit ASNs allocated by the RIRs: 35515
Number of 32-bit ASNs visible in the Routing Table: 29547
Prefixes from 32-bit ASNs in the Routing Table: 137633
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:512
Number of addresses announced to Internet: 2909527424
Equivalent to 173 /8s, 107 /16s and 221 /24s
Percentage of available address space announced: 78.6
Percentage of allocated address space announced: 78.6
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: 289671
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 226292
Total APNIC prefixes after maximum aggregation: 65353
APNIC Deaggregation factor:3.46
Prefixes being announced from the APNIC address blocks: 222401
Unique aggregates announced from the APNIC address blocks:89095
APNIC Region origin ASes present in the Internet Routing Table: 11418
APNIC Prefixes per ASN: 19.48
APNIC Region origin ASes announcing only one prefix: 3248
APNIC Region transit ASes present in the Internet Routing Table: 1619
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: 6573
Number of APNIC addresses announced to Internet: 772179200
Equivalent to 46 /8s, 6 /16s and 133 /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:244801
Total ARIN prefixes after maximum aggregation: 112519
ARIN Deaggregation factor: 2.18
Prefixes being announced from the ARIN address blocks: 245330
Unique aggregates announced from the ARIN address blocks:117363
ARIN Region origin ASes present in the Internet Routing Table:18764
ARIN Prefixes per ASN:13.07
ARIN
