Report Description

This report details the number of web servers that have their name resolve to multiple IP addresses. Presumably, this is for the purpose of providing redundancy and load balancing.

Of the 17,411,168 sites in the September survey that responded to our DNS lookup queries,640,408 (3.7%) had their names resolve to multiple IP addresses. The following graph and table shows how popular the various DNS configurations are that contain multiple IP addresses.

DNS Entries	Number of Servers	Percent
2	260,722	40.7%
3	70,674	11.0%
4	74,116	11.6%
5	14,298	2.2%
6	57,259	8.9%
7	5,896	0.9%
8	78,974	12.3%
9	8,603	1.3%
10	2,612	0.4%
11	16,680	2.6%
12	165	0.0%
13	33	0.0%
14	977	0.2%
15	32	0.0%
16	69	0.0%
17	8	0.0%
18	49,123	7.7%
19	17	0.0%
20	66	0.0%
21	9	0.0%
22	5	0.0%
23	19	0.0%
24	11	0.0%
25	6	0.0%
26	2	0.0%
27	1	0.0%
29	6	0.0%
30	17	0.0%
32	2	0.0%
36	1	0.0%
47	1	0.0%
58	1	0.0%
68	1	0.0%
69	1	0.0%
142	1	0.0%