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, AusNOG, SANOG, PacNOG,
MENOG, SAFNOG, SdNOG, BJNOG, CaribNOG 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 01 Apr, 2017
Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/
Analysis Summary
BGP routing table entries examined: 640530
Prefixes after maximum aggregation (per Origin AS): 249983
Deaggregation factor: 2.56
Unique aggregates announced (without unneeded subnets): 309623
Total ASes present in the Internet Routing Table: 56735
Prefixes per ASN: 11.29
Origin-only ASes present in the Internet Routing Table: 49101
Origin ASes announcing only one prefix: 21741
Transit ASes present in the Internet Routing Table:7634
Transit-only ASes present in the Internet Routing Table:218
Average AS path length visible in the Internet Routing Table: 4.3
Max AS path length visible: 41
Max AS path prepend of ASN ( 55644) 36
Prefixes from unregistered ASNs in the Routing Table:76
Numnber of instances of unregistered ASNs: 77
Number of 32-bit ASNs allocated by the RIRs: 17957
Number of 32-bit ASNs visible in the Routing Table: 13960
Prefixes from 32-bit ASNs in the Routing Table: 56752
Number of bogon 32-bit ASNs visible in the Routing Table:46
Special use prefixes present in the Routing Table:0
Prefixes being announced from unallocated address space:407
Number of addresses announced to Internet: 2840219780
Equivalent to 169 /8s, 74 /16s and 80 /24s
Percentage of available address space announced: 76.7
Percentage of allocated address space announced: 76.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 98.5
Total number of prefixes smaller than registry allocations: 212596
APNIC Region Analysis Summary
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Prefixes being announced by APNIC Region ASes: 175385
Total APNIC prefixes after maximum aggregation: 50122
APNIC Deaggregation factor:3.50
Prefixes being announced from the APNIC address blocks: 174735
Unique aggregates announced from the APNIC address blocks:72195
APNIC Region origin ASes present in the Internet Routing Table:7980
APNIC Prefixes per ASN: 21.90
APNIC Region origin ASes announcing only one prefix: 2239
APNIC Region transit ASes present in the Internet Routing Table: 1126
Average APNIC Region AS path length visible:4.5
Max APNIC Region AS path length visible: 41
Number of APNIC region 32-bit ASNs visible in the Routing Table: 2813
Number of APNIC addresses announced to Internet: 762402692
Equivalent to 45 /8s, 113 /16s and 87 /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, 131072-137529
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:195495
Total ARIN prefixes after maximum aggregation:93596
ARIN Deaggregation factor: 2.09
Prefixes being announced from the ARIN address blocks: 197776
Unique aggregates announced from the ARIN address blocks: 90567
ARIN Region origin ASes present in the Internet Routing Table:17861
ARIN Prefixes per ASN:11.07
ARIN Region or
