searching e164.arpa for NAPTR sets

This is a DNS-based crawler which crawls trough e164.arpa, the top level domain designated for ENUM. Specifically, it looks for NAPTR resource records sets, and tries to discover the whole "golden" ENUM tree

Status: 905371 ENUM numbers (containing 1742185 NAPTR records). Crawling speed: 89 numbers in the last minute.

What is the ENUM crawler?

The ENUM crawler uses certain properties of the e164.arpa namespace to discover all numbers for which ENUM entries (NAPTRs) exist. A full crawling round takes a little longer than a week, currently, so that new numbers should appear after approximately that delay. However, certain nameserver implementations might prevent the crawler to discover all enum-enabled numbers.

top country codes

#	country name	E.164	ENUMs
1.)	Taiwan, Province of China	+886	801421
2.)	Poland	+48	25010
3.)	Austria	+43	20276
4.)	Germany	+49	16350
5.)	Sweden	+46	15652
6.)	Norway	+47	14482
7.)	Korea, Republic of	+82	9403
8.)	Slovakia	+421	894
9.)	Romania	+40	726
10.)	Czech Republic	+420	465
11.)	United Kingdom	+44	300
12.)	Australia	+61	128
13.)	Netherlands	+31	117
14.)	Lithuania	+370	96
15.)	Japan	+81	33
16.)	Qatar	+974	2
17.)	Brazil	+55	2
18.)	Jordan	+962	2
19.)	Greece	+30	2