Index of /apnic/stats/apnic
APNIC ALLOCATION AND ASSIGNMENT REPORTS
(version 2.0 5 January 2004)
1. About these reports
2. Conditions of use
3. Statistics format
1. ABOUT THESE REPORTS
The directory ftp://ftp.apnic.net/pub/stats/apnic/ contains
daily summary reports of the allocations and assignments of numeric
Internet address resources within ranges originally delegated to
APNIC and historical ranges transferred to APNIC by other
The resources reported are:
- IPv4 address ranges (IPv4)
- IPv6 address ranges (IPv6)
- Autonomous System Numbers (ASNs)
These reports are produced as part of a joint Regional Internet
Registry (RIR) project to provide consistent and accessible
Internet resource statistics to the global community. It is hoped
these reports will lead to increased research and analysis of the
global use of address resources.
For detailed information on the RIR statistics exchange format,
2. CONDITIONS OF USE
The files are freely available for download and use on the condition
that APNIC will not be held responsible for any loss or damage
arising from the use of the information contained in these reports.
APNIC endeavours to the best of its ability to ensure the accuracy
of these reports; however, APNIC makes no guarantee in this regard.
In particular, it should be noted that these reports seek to
indicate where resources were first allocated or assigned. It is not
intended that these reports be considered as an authoritative
statement of the location in which any specific resource may
currently be in use.
3. STATISTICS FORMAT
3.1 File names
Each file is named using the format:
The most recent file will also be available under the name:
3.2 File format
The file consists of:
- file header lines
Header and record lines are structured as 'comma separated fields'
(CSV). Leading and trailing blank text in fields not meaningful.
The vertical line character '|' (ASCII code 0x7c) is used as the
CSV field separator.
After the header lines, records are not sorted.
Comments are denoted by # at the beginning of a line. No
line-embedded comments are permitted. Comments may occur at
any place in the file.
# any number of lines.
#another optional comment.
Blank lines are permitted, and may occur at any place in the file.
3.2.2 File header
The file header consists of the version line and the summary
lines for each type of record.
version format version number of this file,
registry as for records and filename (see below);
serial serial number of this file (within the
creating RIR series);
records number of records in file, excluding blank
lines, summary lines, the version line and
startdate start date of time period, in yyyymmdd
enddate end date of period in yyyymmdd format;
UTCoffset offset from UTC (+/- hours) of local RIR
The summary lines count the number of record lines of each type in
registry as for records (see below);
* an ASCII '*' (unused field, retained for
type as for records (defined below);
count sum of the number of record lines of this
type in the file.
summary the ASCII string 'summary' (to distinguish
the record line);
Note that the count does not equate to the total amount of resources
for each class of record. This is to be computed from the records
After the defined file header, and excluding any space or comments,
each line in the file represents a single allocation (or assignment)
of a specific range of Internet number resources (IPv4, IPv6 or
ASN), made by the RIR identified in the record.
IPv4 records may represent non-CIDR ranges or CIDR blocks, and
therefore the record format represents the beginning of range, and a
count. This can be converted to prefix/length using simple algorithms.
IPv6 records represent the prefix and the count of /128 instances
under that prefix.
registry The registry from which the data is taken.
For APNIC resources, this will be:
cc ISO 3166 2-letter code of the organisation to
which the allocation or assignment was made.
type Type of Internet number resource represented
in this record. One value from the set of
start In the case of records of type 'ipv4' or
'ipv6' this is the IPv4 or IPv6 'first
address' of the range.
In the case of an 16 bit AS number, the
format is the integer value in the range:
0 - 65535
In the case of a 32 bit ASN, the value is
in the range:
0 - 4294967296
No distinction is drawn between 16 and 32
bit ASN values in the range 0 to 65535.
value In the case of IPv4 address the count of
hosts for this range. This count does not
have to represent a CIDR range.
In the case of an IPv6 address the value
will be the CIDR prefix length from the
'first address' value of <start>.
In the case of records of type 'asn' the
number is the count of AS from this start
date Date on this allocation/assignment was made
by the RIR in the format:
Where the allocation or assignment has been
transferred from another registry, this date
represents the date of first assignment or
allocation as received in from the original
It is noted that where records do not show a
date of first assignment, this can take the
status Type of allocation from the set:
This is the allocation or assignment made by
the registry producing the file and not any
sub-assignment by other agencies.
extensions In future, this may include extra data that
is yet to be defined.
3.3 Historical resources
Early Registration Transfers (ERX) and AUNIC legacy records do not
have any special tagging in the statistics reports.
If you any questions or comments about these reports, please contact