how many BGP routers, how many ASes
Ray.Sanders at VillageVoiceMedia.com
Wed May 13 11:19:10 CDT 2009
This is sent weekly to the list:
Routing Table Report 04:00 +10GMT Sat 09 May, 2009
Report Website: http://thyme.apnic.net
Detailed Analysis: http://thyme.apnic.net/current/
BGP routing table entries examined: 288037
Prefixes after maximum aggregation: 136199
Deaggregation factor: 2.11
Unique aggregates announced to Internet: 140785
Total ASes present in the Internet Routing Table: 31199
Prefixes per ASN: 9.23
Origin-only ASes present in the Internet Routing Table: 27142
Origin ASes announcing only one prefix: 13239
Transit ASes present in the Internet Routing Table: 4057
Transit-only ASes present in the Internet Routing Table: 96
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 33
Max AS path prepend of ASN (43683) 31
Prefixes from unregistered ASNs in the Routing Table: 461
Unregistered ASNs in the Routing Table: 151
Number of 32-bit ASNs allocated by the RIRs: 142
Prefixes from 32-bit ASNs in the Routing Table: 30
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 194
Number of addresses announced to Internet: 2039977920
Equivalent to 121 /8s, 151 /16s and 151 /24s
Percentage of available address space announced: 55.0
Percentage of allocated address space announced: 63.7
Percentage of available address space allocated: 86.4
Percentage of address space in use by end-sites: 76.9
Total number of prefixes smaller than registry allocations: 142407
On Wed, 2009-05-13 at 16:53 +0100, Irfan Zakiuddin wrote:
> Hi all,
> I have scouted around for this information, but not get very far. I'm
> hoping someone will have answers at hand.
> What I want to know is roughly how many :
> 1. ASes there are in the world today?
> 2. BGP routers there are, for intra-domain as well as inter-domain routing,
> in total in the world?
> 3. BGP routers do the largest ASes have?
> Really interesting would then be to say either how fast the above numbers
> are growing, or to give estimates for what the answers to 1-3 will be in 5
> years time.
> An Internet source that provides the above information would be most useful
> - though I can't seem to find it with google.
> I'd be grateful for answer to be sent to me directly, whether you also post
> to NANOG is up to you.
> thanks in advance.
"Prediction is very difficult, especially about the future." Niels Bohr
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