[ (Non-cross)posted to NANOG, PPML, RIPE IPv6 wg, Dutch IPv6 TF. Web version
for the monospace font impaired and with some links:
http://www.bgpexpert.com/addrspace2009.php ]
2009 IPv4 Address Use Report
As of January first, 2010, the number of unused IPv4 addresses is 722.18
million. On January 1, 2009, this was 925.58 million. So in 2009, 203.4 million
addresses were used up. This is the first time since the introduction of CIDR
in 1993 that the number of addresses used in a year has topped 200 million.
With 3706.65 million usable addresses, 80.5% of the available IPv4 addresses
are now in some kind of use, up from 75.3% a year ago. So the depletion of the
IPv4 address reserves is continuing in much the same way as in previous years:
Date Addresses free Used up
2006-01-01 1468.61 M
2007-01-01 1300.65 M167.96 M
2008-01-01 1122.85 M177.80 M (with return of 16.78 M to IANA)
2009-01-01 925.58 M197.27 M
2010-01-01 722.18 M203.40 M
These figures are derived from from the Internet Assigned Numbers Authority's
IANA IPv4 Address Space Registry page and the records published on the FTP
servers of the five Regional Internet Registries (RIRs): AfriNIC, which gives
out address space in Africa, APNIC (Asia-Pacific region), ARIN (North America),
LACNIC (Latin American and the Caribbean) and the RIPE NCC (Europe, the former
Soviet Union and the Middle East).
The IANA list shows the status of all 256 blocks of 16777216 addresses
identified by the first 8-bit number in the IPv4 address.
http://www.bgpexpert.com/ianaglobalpool.php is a graphical representation of
the IANA global pool (updated weekly). The RIR data indicates how much address
space the RIRs have delegated to internet service providers (and sometimes
end-users). The changes over the course of 2009 are as follows:
DelegatedBlocks +/- 2009 Addresses Used Available
to/status (in millions)
AfriNIC 2 33.55 14.89 18.66
APNIC34 +4 570.42 540.36 30.06
ARIN 31520.09 486.58 33.51
LACNIC6100.66 79.77 20.89
RIPE NCC 30 +4 503.32 450.11 53.21
RIRs subtotal 103 +8 1728.051571.71 156.34
LEGACY 92 1543.501413.88 129.62
UNALLOCATED 26 -8 436.21 436.21
Totals 221 3707.762985.59 722.17
The RIRs requested an unusually small number of /8s from IANA: only eight. As a
result, APNIC is well below the nine months working inventory threshold, so it
should be getting no less than six additional /8s soon to get back to 18 months
working inventory. Similarly, ARIN should be getting five additional /8s soon.
This would bring us to 15 /8s remaining in the IANA global pool, and should
allow for regular operation for about the rest of the year. Then in early 2011,
the next round of delegations will have to happen, which may or may not hit the
magic fifth-to-last /8, after which the remaining four will be given to the
other four RIRs and then each RIR will run out of IPv4 space at its own pace.
The total number of available addresses is slightly higher than the previously
mentioned figure at 3707.76 million because the table above includes
172.16.0.0/12 and 192.168.0.0/16, which are set aside for private use.
Networks 0.0.0.0/8 and 127.0.0.0/8 aren't usable because of special uses and
10.0.0.0/8 is also set aside for private use. 224 - 239 are multicast
addresses, and 240 - 255 is class E, which is "reserved for future use".
The 2985 million addresses currently in use aren't very evenly distributed over
the countries in the world. The current top 15 is:
2010-01-01 2009-01-01increase Country
1 - US 1495.13 M1458.21 M 2.3%United States
2 - CN232.45 M 181.80 M 27.9%China
3 - JP177.15 M 151.56 M 16.9%Japan
4 - EU149.48 M 120.29 M 24.3%Multi-country in Europe
5(6)DE 86.51 M 81.75 M 5.8%Germany
6(9)KR 77.77 M 66.82 M 16.4%Korea
7 - CA 76.96 M 74.49 M 3.3%Canada
8 - FR 75.54 M 68.04 M 11.0%France
9(5)GB 74.18 M 86.31 M-14.1%United Kingdom
10- AU 39.77 M 36.26 M 9.7%Australia
11- BR 33.95 M 29.75 M 14.1%Brazil
12- IT 33.50 M 29.64 M 13.0%Italy
13 (14) RU 28.47 M 23.18 M 22.8%Russia
14 (13) TW 27.10 M 24.01 M 12.9%Taiwan
15 (17) NL 22.84 M 21.67 M 5.4%Netherlands
The reduction in address use by the UK is because net 51.0.0.0/8 is now
registered as country
