DomainTools.com

The following is an IP mapping of domains in the COM, NET, ORG, INFO, BIZ, US space. The number of domains that resolve to which network addresses. Each network address coincides with an authority for that block, usually that authority resides in just one continent. A Network Block also goes by the name Class-A network. Blocks with fewer then 50 domains have been set to zero for simplicity. Domain owners may map DNS of their domain to any IP, but the domain will not resolve if the IP is in a dead zone.

Class-A	Domains Hosted	Description
1	24,631	IANA - Reserved
2	0	IANA - Reserved
3	0	General Electric Company
4	16,763	Level3/Genuity-BBN (IANA INFO: Bolt Beranek and Newman Inc.)
5	0	IANA - Reserved
6	0	Army Information Systems Center
7	0	IANA - Reserved
8	26,057	Level3/Genuity-BBN (IANA INFO: Bolt Beranek and Newman Inc.)
9	0	IBM
10	1,978	IANA - Private Use. See RFC 1918
11	79	DoD Intel Information Systems
12	214,231	AT&T Bell Laboratories
13	177	Xerox Corporation
14	0	IANA - Public Data Network
15	147	Hewlett-Packard Company
16	0	Digital Equipment Corporation
17	180	Apple Computer Inc.
18	498	MIT
19	0	Ford Motor Company
20	69	Computer Sciences Corporation
21	0	DDN-RVN
22	0	Defense Information Systems Agency
23	0	IANA - Reserved
24	144,335	ARIN - Cable Block (Formerly IANA - Jul 95)
25	0	Royal Signals and Radar Establishment
26	0	Defense Information Systems Agency
27	0	IANA - Reserved
28	0	DSI-North
29	0	Defense Information Systems Agency
30	0	Defense Information Systems Agency
31	0	IANA - Reserved
32	280	AT&T (IANA INFO: Norsk Informasjonsteknologi)
33	0	DLA Systems Automation Center
34	0	Halliburton Company
35	374	MERIT Computer Network
36	0	IANA - Reserved (Formerly Stanford University - Apr 93 to
37	0	IANA - Reserved
38	184,649	COGENT/PSI (IANA INFO: Performance Systems International)
39	0	IANA - Reserved
40	285	Eli Lily and Company
41	0	AFRINIC
42	0	IANA - Reserved
43	1,549	V6NIC
44	0	Amateur Radio Digital Communications
45	0	Interop Show Network
46	0	Level3/Genuity-BBN (IANA INFO: Bolt Beranek and Newman Inc.)
47	53	Nortel (IANA INFO: Bell-Northern Research)
48	0	Prudential Securities Inc.
49	0	IANA (Formerly DoD - Joint Technical Command. Used: May 94
50	0	IANA (Formerly DoD - Joint Technical Command. Used: May 94
51	0	Deparment of Social Security of UK (EU territory should be
52	93	E.I. duPont de Nemours and Co., Inc.
53	69	Cap Debis CCS (EU territory should be in RIPE database)
54	0	Merck and Co., Inc.
55	0	Naval Ocean Systems Center (IANA INFO: Boeing Computer Services)
56	0	U.S. Postal Service
57	542	SITA (Equant.Net routable. EU territory should be in RIPE database)
58	14,259	APNIC
59	41,684	APNIC
60	24,364	APNIC
61	439,278	APNIC
62	860,328	RIPE
63	842,130	ARIN
64	10,248,765	ARIN
65	1,374,615	ARIN
66	6,030,266	ARIN
67	988,896	ARIN
68	1,134,834	ARIN
69	2,269,583	ARIN
70	620,392	ARIN
71	37,917	ARIN
72	764,684	ARIN
73	0	ARIN
74	0	ARIN
75	0	ARIN
76	0	ARIN
77	0	IANA - Reserved
78	0	IANA - Reserved
79	0	IANA - Reserved
80	1,006,610	RIPE
81	548,040	RIPE
82	1,253,887	RIPE
83	370,109	RIPE
84	248,976	RIPE
85	130,775	RIPE
86	19,068	RIPE
87	15,909	RIPE
88	693	RIPE
89	0	RIPE
90	0	RIPE
91	0	RIPE
92	0	IANA - Reserved
93	0	IANA - Reserved
94	0	IANA - Reserved
95	0	IANA - Reserved
96	0	IANA - Reserved
97	0	IANA - Reserved
98	0	IANA - Reserved
99	156	IANA - Reserved
100	0	IANA - Reserved
101	0	IANA - Reserved
102	0	IANA - Reserved
103	0	IANA - Reserved
104	0	IANA - Reserved
105	0	IANA - Reserved
106	0	IANA - Reserved
107	0	IANA - Reserved
108	0	IANA - Reserved
109	0	IANA - Reserved
110	0	IANA - Reserved
111	53	IANA - Reserved
112	0	IANA - Reserved
113	0	IANA - Reserved
114	0	IANA - Reserved
115	0	IANA - Reserved
116	0	IANA - Reserved
117	0	IANA - Reserved
118	0	IANA - Reserved
119	0	IANA - Reserved
120	0	IANA - Reserved
121	0	IANA - Reserved
122	60	IANA - Reserved
123	63	IANA - Reserved
124	0	APNIC
125	761	APNIC
126	0	APNIC
127	10,095	IANA - Reserved Loopback. See RFC 3330
128	81,753	Various Registries - Early Internic Registrations
129	19,801	Various Registries - Early Internic Registrations
130	32,459	Various Registries - Early Internic Registrations
131	5,982	Various Registries - Early Internic Registrations
132	1,852	Various Registries - Early Internic Registrations
133	690	JPNIC
134	5,889	Various Registries - Early Internic Registrations
135	786	Various Registries - Early Internic Registrations
136	7,109	Various Registries - Early Internic Registrations
137	3,599	Various Registries - Early Internic Registrations
138	2,003	Various Registries - Early Internic Registrations
139	26,376	Various Registries - Early Internic Registrations
140	24,882	Various Registries - Early Internic Registrations
141	9,900	Various Registries - Early Internic Registrations
142	12,182	Various Registries - Early Internic Registrations
143	3,789	Various Registries - Early Internic Registrations
144	5,085	Various Registries - Early Internic Registrations
145	7,124	RIPE
146	14,873	Various Registries - Early Internic Registrations
147	42,144	Various Registries - Early Internic Registrations
148	11,745	Various Registries - Early Internic Registrations
149	7,621	Various Registries - Early Internic Registrations
150	4,918	Various Registries - Early Internic Registrations
151	27,908	Various Registries - Early Internic Registrations
152	5,050	Various Registries - Early Internic Registrations
153	1,132	Various Registries - Early Internic Registrations
154	2,535	Various Registries - Early Internic Registrations
155	9,310	Various Registries - Early Internic Registrations
156	2,647	Various Registries - Early Internic Registrations
157	7,968	Various Registries - Early Internic Registrations
158	2,343	Various Registries - Early Internic Registrations
159	25,066	Various Registries - Early Internic Registrations
160	6,109	Various Registries - Early Internic Registrations
161	139,209	Various Registries - Early Internic Registrations
162	15,446	Various Registries - Early Internic Registrations
163	2,687	Various Registries - Early Internic Registrations
164	27,763	Various Registries - Early Internic Registrations
165	10,365	Various Registries - Early Internic Registrations
166	13,199	Various Registries - Early Internic Registrations
167	18,613	Various Registries - Early Internic Registrations
168	88,412	Various Registries - Early Internic Registrations
169	2,602	Various Registries - Early Internic Registrations
170	8,460	Various Registries - Early Internic Registrations
171	1,559	Various Registries - Early Internic Registrations
172	617	Various Registries - Early Internic Registrations
173	0	IANA - Reserved
174	0	IANA - Reserved
175	0	IANA - Reserved
176	0	IANA - Reserved
177	0	IANA - Reserved
178	0	IANA - Reserved
179	0	IANA - Reserved
180	0	IANA - Reserved
181	0	IANA - Reserved
182	0	IANA - Reserved
183	0	IANA - Reserved
184	0	IANA - Reserved
185	0	IANA - Reserved
186	0	IANA - Reserved
187	0	IANA - Reserved
188	0	RIPE
189	0	LACNIC
190	0	LACNIC
191	0	Reserved - ARIN whois shows only one allocation of 191.255.0.0/16
192	281,709	Various Registries MultiRegional - Early Registrations
193	320,267	RIPE
194	407,628	RIPE
195	976,105	RIPE
196	33,658	AFRINIC
197	0	IANA - Reserved
198	293,866	Various Registries - Early Internic Registrations
199	138,804	ARIN - North America
200	164,054	LACNIC
201	9,633	LACNIC
202	493,399	APNIC
203	354,586	APNIC
204	1,819,542	ARIN - North America
205	502,428	ARIN - North America
206	615,148	ARIN - North America
207	1,095,785	ARIN - North America
208	991,844	ARIN - North America
209	1,585,508	ARIN - North America
210	496,073	APNIC
211	360,059	APNIC
212	1,962,779	RIPE
213	1,223,617	RIPE
214	0	US Department of Defense
215	0	US Department of Defense
216	6,586,977	ARIN - North America
217	1,178,999	RIPE
218	484,218	APNIC
219	139,164	APNIC
220	100,163	APNIC
221	81,363	APNIC
222	143,613	APNIC
223	0	IANA - Reserved
224	0	IANA - Multicast. See RFC 3171
225	0	IANA - Multicast. See RFC 3171
226	0	IANA - Multicast. See RFC 3171
227	0	IANA - Multicast. See RFC 3171
228	0	IANA - Multicast. See RFC 3171
229	0	IANA - Multicast. See RFC 3171
230	0	IANA - Multicast. See RFC 3171
231	0	IANA - Multicast. See RFC 3171
232	0	IANA - Multicast. See RFC 3171
233	0	IANA - Multicast. See RFC 3171
234	0	IANA - Multicast. See RFC 3171
235	0	IANA - Multicast. See RFC 3171
236	0	IANA - Multicast. See RFC 3171
237	0	IANA - Multicast. See RFC 3171
238	0	IANA - Multicast. See RFC 3171
239	0	IANA - Multicast. See RFC 3171
240	0	IANA - Reserved
241	0	IANA - Reserved
242	0	IANA - Reserved
243	0	IANA - Reserved
244	0	IANA - Reserved
245	0	IANA - Reserved
246	0	IANA - Reserved
247	0	IANA - Reserved
248	0	IANA - Reserved
249	0	IANA - Reserved
250	0	IANA - Reserved
251	0	IANA - Reserved
252	0	IANA - Reserved
253	0	IANA - Reserved
254	0	IANA - Reserved
255	6,015	IANA - Reserved

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