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 18 Apr, 2020
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 806496
Prefixes after maximum aggregation (per Origin AS): 306294
Deaggregation factor: 2.63
Unique aggregates announced (without unneeded subnets): 393395
Total ASes present in the Internet Routing Table: 67775
Prefixes per ASN: 11.90
Origin-only ASes present in the Internet Routing Table: 58227
Origin ASes announcing only one prefix: 24284
Transit ASes present in the Internet Routing Table:9548
Transit-only ASes present in the Internet Routing Table:293
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 43
Max AS path prepend of ASN ( 27978) 31
Prefixes from unregistered ASNs in the Routing Table: 1135
Number of instances of unregistered ASNs: 1138
Number of 32-bit ASNs allocated by the RIRs: 31315
Number of 32-bit ASNs visible in the Routing Table: 25896
Prefixes from 32-bit ASNs in the Routing Table: 119373
Number of bogon 32-bit ASNs visible in the Routing Table:21
Special use prefixes present in the Routing Table:1
Prefixes being announced from unallocated address space:887
Number of addresses announced to Internet: 2854764032
Equivalent to 170 /8s, 40 /16s and 62 /24s
Percentage of available address space announced: 77.1
Percentage of allocated address space announced: 77.1
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: 271711
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 212063
Total APNIC prefixes after maximum aggregation: 62008
APNIC Deaggregation factor:3.42
Prefixes being announced from the APNIC address blocks: 205066
Unique aggregates announced from the APNIC address blocks:85529
APNIC Region origin ASes present in the Internet Routing Table: 10525
APNIC Prefixes per ASN: 19.48
APNIC Region origin ASes announcing only one prefix: 2927
APNIC Region transit ASes present in the Internet Routing Table: 1567
Average APNIC Region AS path length visible:4.5
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 5590
Number of APNIC addresses announced to Internet: 766930816
Equivalent to 45 /8s, 182 /16s and 111 /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, 131072-141625
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:235932
Total ARIN prefixes after maximum aggregation: 108500
ARIN Deaggregation factor: 2.17
Prefixes being announced from the ARIN address blocks: 233397
Unique aggregates announced from the ARIN address blocks:118491
ARIN Region origin ASes present in the Internet Routing Table:18432
ARIN Prefixes per ASN:12.66
ARIN
