IPv6 Subnet Calculator

Enter an IPv6 address with a prefix to see its network, address range, number of /64 subnets, and its full and short forms. You can also split the prefix into smaller subnets.

Try:2001:db8:abcd::1/48 2001:db8::/32 fd00:1234::/56 fe80::1/64

IPv4 calculator →

documentation2001:db8:abcd:51::/64

network2001:db8:abcd:51::/64

first host2001:db8:abcd:51::

last host2001:db8:abcd:51:ffff:ffff:ffff:ffff

addresses2⁶⁴ = 18,446,744,073,709,551,616

/64 subnets1

short form2001:db8:abcd:51::

ipcalc 2001:db8:abcd:51::/64

address2001:0db8:abcd:0051:0000:0000:0000:0000

network2001:0db8:abcd:0051:0000:0000:0000:0000

last host2001:0db8:abcd:0051:ffff:ffff:ffff:ffff

green = network digits, amber = digit split by the prefix

full form2001:0db8:abcd:0051:0000:0000:0000:0000

reverse dns0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.5.0.0.d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa

/64 split into /126 · 4,611,686,018,427,387,904 subnets

close ×

#	network	last address
1	2001:db8:abcd:51::/126	2001:db8:abcd:51::3
2	2001:db8:abcd:51::4/126	2001:db8:abcd:51::7
3	2001:db8:abcd:51::8/126	2001:db8:abcd:51::b
4	2001:db8:abcd:51::c/126	2001:db8:abcd:51::f
5	2001:db8:abcd:51::10/126	2001:db8:abcd:51::13
6	2001:db8:abcd:51::14/126	2001:db8:abcd:51::17
7	2001:db8:abcd:51::18/126	2001:db8:abcd:51::1b
8	2001:db8:abcd:51::1c/126	2001:db8:abcd:51::1f
9	2001:db8:abcd:51::20/126	2001:db8:abcd:51::23
10	2001:db8:abcd:51::24/126	2001:db8:abcd:51::27
11	2001:db8:abcd:51::28/126	2001:db8:abcd:51::2b
12	2001:db8:abcd:51::2c/126	2001:db8:abcd:51::2f
13	2001:db8:abcd:51::30/126	2001:db8:abcd:51::33
14	2001:db8:abcd:51::34/126	2001:db8:abcd:51::37
15	2001:db8:abcd:51::38/126	2001:db8:abcd:51::3b
16	2001:db8:abcd:51::3c/126	2001:db8:abcd:51::3f
17	2001:db8:abcd:51::40/126	2001:db8:abcd:51::43
18	2001:db8:abcd:51::44/126	2001:db8:abcd:51::47
19	2001:db8:abcd:51::48/126	2001:db8:abcd:51::4b
20	2001:db8:abcd:51::4c/126	2001:db8:abcd:51::4f
21	2001:db8:abcd:51::50/126	2001:db8:abcd:51::53
22	2001:db8:abcd:51::54/126	2001:db8:abcd:51::57
23	2001:db8:abcd:51::58/126	2001:db8:abcd:51::5b
24	2001:db8:abcd:51::5c/126	2001:db8:abcd:51::5f
25	2001:db8:abcd:51::60/126	2001:db8:abcd:51::63
26	2001:db8:abcd:51::64/126	2001:db8:abcd:51::67
27	2001:db8:abcd:51::68/126	2001:db8:abcd:51::6b
28	2001:db8:abcd:51::6c/126	2001:db8:abcd:51::6f
29	2001:db8:abcd:51::70/126	2001:db8:abcd:51::73
30	2001:db8:abcd:51::74/126	2001:db8:abcd:51::77
31	2001:db8:abcd:51::78/126	2001:db8:abcd:51::7b
32	2001:db8:abcd:51::7c/126	2001:db8:abcd:51::7f
33	2001:db8:abcd:51::80/126	2001:db8:abcd:51::83
34	2001:db8:abcd:51::84/126	2001:db8:abcd:51::87
35	2001:db8:abcd:51::88/126	2001:db8:abcd:51::8b
36	2001:db8:abcd:51::8c/126	2001:db8:abcd:51::8f
37	2001:db8:abcd:51::90/126	2001:db8:abcd:51::93
38	2001:db8:abcd:51::94/126	2001:db8:abcd:51::97
39	2001:db8:abcd:51::98/126	2001:db8:abcd:51::9b
40	2001:db8:abcd:51::9c/126	2001:db8:abcd:51::9f
41	2001:db8:abcd:51::a0/126	2001:db8:abcd:51::a3
42	2001:db8:abcd:51::a4/126	2001:db8:abcd:51::a7
43	2001:db8:abcd:51::a8/126	2001:db8:abcd:51::ab
44	2001:db8:abcd:51::ac/126	2001:db8:abcd:51::af
45	2001:db8:abcd:51::b0/126	2001:db8:abcd:51::b3
46	2001:db8:abcd:51::b4/126	2001:db8:abcd:51::b7
47	2001:db8:abcd:51::b8/126	2001:db8:abcd:51::bb
48	2001:db8:abcd:51::bc/126	2001:db8:abcd:51::bf
49	2001:db8:abcd:51::c0/126	2001:db8:abcd:51::c3
50	2001:db8:abcd:51::c4/126	2001:db8:abcd:51::c7
51	2001:db8:abcd:51::c8/126	2001:db8:abcd:51::cb
52	2001:db8:abcd:51::cc/126	2001:db8:abcd:51::cf
53	2001:db8:abcd:51::d0/126	2001:db8:abcd:51::d3
54	2001:db8:abcd:51::d4/126	2001:db8:abcd:51::d7
55	2001:db8:abcd:51::d8/126	2001:db8:abcd:51::db
56	2001:db8:abcd:51::dc/126	2001:db8:abcd:51::df
57	2001:db8:abcd:51::e0/126	2001:db8:abcd:51::e3
58	2001:db8:abcd:51::e4/126	2001:db8:abcd:51::e7
59	2001:db8:abcd:51::e8/126	2001:db8:abcd:51::eb
60	2001:db8:abcd:51::ec/126	2001:db8:abcd:51::ef
61	2001:db8:abcd:51::f0/126	2001:db8:abcd:51::f3
62	2001:db8:abcd:51::f4/126	2001:db8:abcd:51::f7
63	2001:db8:abcd:51::f8/126	2001:db8:abcd:51::fb
64	2001:db8:abcd:51::fc/126	2001:db8:abcd:51::ff
65	2001:db8:abcd:51::100/126	2001:db8:abcd:51::103
66	2001:db8:abcd:51::104/126	2001:db8:abcd:51::107
67	2001:db8:abcd:51::108/126	2001:db8:abcd:51::10b
68	2001:db8:abcd:51::10c/126	2001:db8:abcd:51::10f
69	2001:db8:abcd:51::110/126	2001:db8:abcd:51::113
70	2001:db8:abcd:51::114/126	2001:db8:abcd:51::117
71	2001:db8:abcd:51::118/126	2001:db8:abcd:51::11b
72	2001:db8:abcd:51::11c/126	2001:db8:abcd:51::11f
73	2001:db8:abcd:51::120/126	2001:db8:abcd:51::123
74	2001:db8:abcd:51::124/126	2001:db8:abcd:51::127
75	2001:db8:abcd:51::128/126	2001:db8:abcd:51::12b
76	2001:db8:abcd:51::12c/126	2001:db8:abcd:51::12f
77	2001:db8:abcd:51::130/126	2001:db8:abcd:51::133
78	2001:db8:abcd:51::134/126	2001:db8:abcd:51::137
79	2001:db8:abcd:51::138/126	2001:db8:abcd:51::13b
80	2001:db8:abcd:51::13c/126	2001:db8:abcd:51::13f
81	2001:db8:abcd:51::140/126	2001:db8:abcd:51::143
82	2001:db8:abcd:51::144/126	2001:db8:abcd:51::147
83	2001:db8:abcd:51::148/126	2001:db8:abcd:51::14b
84	2001:db8:abcd:51::14c/126	2001:db8:abcd:51::14f
85	2001:db8:abcd:51::150/126	2001:db8:abcd:51::153
86	2001:db8:abcd:51::154/126	2001:db8:abcd:51::157
87	2001:db8:abcd:51::158/126	2001:db8:abcd:51::15b
88	2001:db8:abcd:51::15c/126	2001:db8:abcd:51::15f
89	2001:db8:abcd:51::160/126	2001:db8:abcd:51::163
90	2001:db8:abcd:51::164/126	2001:db8:abcd:51::167
91	2001:db8:abcd:51::168/126	2001:db8:abcd:51::16b
92	2001:db8:abcd:51::16c/126	2001:db8:abcd:51::16f
93	2001:db8:abcd:51::170/126	2001:db8:abcd:51::173
94	2001:db8:abcd:51::174/126	2001:db8:abcd:51::177
95	2001:db8:abcd:51::178/126	2001:db8:abcd:51::17b
96	2001:db8:abcd:51::17c/126	2001:db8:abcd:51::17f
97	2001:db8:abcd:51::180/126	2001:db8:abcd:51::183
98	2001:db8:abcd:51::184/126	2001:db8:abcd:51::187
99	2001:db8:abcd:51::188/126	2001:db8:abcd:51::18b
100	2001:db8:abcd:51::18c/126	2001:db8:abcd:51::18f
101	2001:db8:abcd:51::190/126	2001:db8:abcd:51::193
102	2001:db8:abcd:51::194/126	2001:db8:abcd:51::197
103	2001:db8:abcd:51::198/126	2001:db8:abcd:51::19b
104	2001:db8:abcd:51::19c/126	2001:db8:abcd:51::19f
105	2001:db8:abcd:51::1a0/126	2001:db8:abcd:51::1a3
106	2001:db8:abcd:51::1a4/126	2001:db8:abcd:51::1a7
107	2001:db8:abcd:51::1a8/126	2001:db8:abcd:51::1ab
108	2001:db8:abcd:51::1ac/126	2001:db8:abcd:51::1af
109	2001:db8:abcd:51::1b0/126	2001:db8:abcd:51::1b3
110	2001:db8:abcd:51::1b4/126	2001:db8:abcd:51::1b7
111	2001:db8:abcd:51::1b8/126	2001:db8:abcd:51::1bb
112	2001:db8:abcd:51::1bc/126	2001:db8:abcd:51::1bf
113	2001:db8:abcd:51::1c0/126	2001:db8:abcd:51::1c3
114	2001:db8:abcd:51::1c4/126	2001:db8:abcd:51::1c7
115	2001:db8:abcd:51::1c8/126	2001:db8:abcd:51::1cb
116	2001:db8:abcd:51::1cc/126	2001:db8:abcd:51::1cf
117	2001:db8:abcd:51::1d0/126	2001:db8:abcd:51::1d3
118	2001:db8:abcd:51::1d4/126	2001:db8:abcd:51::1d7
119	2001:db8:abcd:51::1d8/126	2001:db8:abcd:51::1db
120	2001:db8:abcd:51::1dc/126	2001:db8:abcd:51::1df
121	2001:db8:abcd:51::1e0/126	2001:db8:abcd:51::1e3
122	2001:db8:abcd:51::1e4/126	2001:db8:abcd:51::1e7
123	2001:db8:abcd:51::1e8/126	2001:db8:abcd:51::1eb
124	2001:db8:abcd:51::1ec/126	2001:db8:abcd:51::1ef
125	2001:db8:abcd:51::1f0/126	2001:db8:abcd:51::1f3
126	2001:db8:abcd:51::1f4/126	2001:db8:abcd:51::1f7
127	2001:db8:abcd:51::1f8/126	2001:db8:abcd:51::1fb
128	2001:db8:abcd:51::1fc/126	2001:db8:abcd:51::1ff
129	2001:db8:abcd:51::200/126	2001:db8:abcd:51::203
130	2001:db8:abcd:51::204/126	2001:db8:abcd:51::207
131	2001:db8:abcd:51::208/126	2001:db8:abcd:51::20b
132	2001:db8:abcd:51::20c/126	2001:db8:abcd:51::20f
133	2001:db8:abcd:51::210/126	2001:db8:abcd:51::213
134	2001:db8:abcd:51::214/126	2001:db8:abcd:51::217
135	2001:db8:abcd:51::218/126	2001:db8:abcd:51::21b
136	2001:db8:abcd:51::21c/126	2001:db8:abcd:51::21f
137	2001:db8:abcd:51::220/126	2001:db8:abcd:51::223
138	2001:db8:abcd:51::224/126	2001:db8:abcd:51::227
139	2001:db8:abcd:51::228/126	2001:db8:abcd:51::22b
140	2001:db8:abcd:51::22c/126	2001:db8:abcd:51::22f
141	2001:db8:abcd:51::230/126	2001:db8:abcd:51::233
142	2001:db8:abcd:51::234/126	2001:db8:abcd:51::237
143	2001:db8:abcd:51::238/126	2001:db8:abcd:51::23b
144	2001:db8:abcd:51::23c/126	2001:db8:abcd:51::23f
145	2001:db8:abcd:51::240/126	2001:db8:abcd:51::243
146	2001:db8:abcd:51::244/126	2001:db8:abcd:51::247
147	2001:db8:abcd:51::248/126	2001:db8:abcd:51::24b
148	2001:db8:abcd:51::24c/126	2001:db8:abcd:51::24f
149	2001:db8:abcd:51::250/126	2001:db8:abcd:51::253
150	2001:db8:abcd:51::254/126	2001:db8:abcd:51::257
151	2001:db8:abcd:51::258/126	2001:db8:abcd:51::25b
152	2001:db8:abcd:51::25c/126	2001:db8:abcd:51::25f
153	2001:db8:abcd:51::260/126	2001:db8:abcd:51::263
154	2001:db8:abcd:51::264/126	2001:db8:abcd:51::267
155	2001:db8:abcd:51::268/126	2001:db8:abcd:51::26b
156	2001:db8:abcd:51::26c/126	2001:db8:abcd:51::26f
157	2001:db8:abcd:51::270/126	2001:db8:abcd:51::273
158	2001:db8:abcd:51::274/126	2001:db8:abcd:51::277
159	2001:db8:abcd:51::278/126	2001:db8:abcd:51::27b
160	2001:db8:abcd:51::27c/126	2001:db8:abcd:51::27f
161	2001:db8:abcd:51::280/126	2001:db8:abcd:51::283
162	2001:db8:abcd:51::284/126	2001:db8:abcd:51::287
163	2001:db8:abcd:51::288/126	2001:db8:abcd:51::28b
164	2001:db8:abcd:51::28c/126	2001:db8:abcd:51::28f
165	2001:db8:abcd:51::290/126	2001:db8:abcd:51::293
166	2001:db8:abcd:51::294/126	2001:db8:abcd:51::297
167	2001:db8:abcd:51::298/126	2001:db8:abcd:51::29b
168	2001:db8:abcd:51::29c/126	2001:db8:abcd:51::29f
169	2001:db8:abcd:51::2a0/126	2001:db8:abcd:51::2a3
170	2001:db8:abcd:51::2a4/126	2001:db8:abcd:51::2a7
171	2001:db8:abcd:51::2a8/126	2001:db8:abcd:51::2ab
172	2001:db8:abcd:51::2ac/126	2001:db8:abcd:51::2af
173	2001:db8:abcd:51::2b0/126	2001:db8:abcd:51::2b3
174	2001:db8:abcd:51::2b4/126	2001:db8:abcd:51::2b7
175	2001:db8:abcd:51::2b8/126	2001:db8:abcd:51::2bb
176	2001:db8:abcd:51::2bc/126	2001:db8:abcd:51::2bf
177	2001:db8:abcd:51::2c0/126	2001:db8:abcd:51::2c3
178	2001:db8:abcd:51::2c4/126	2001:db8:abcd:51::2c7
179	2001:db8:abcd:51::2c8/126	2001:db8:abcd:51::2cb
180	2001:db8:abcd:51::2cc/126	2001:db8:abcd:51::2cf
181	2001:db8:abcd:51::2d0/126	2001:db8:abcd:51::2d3
182	2001:db8:abcd:51::2d4/126	2001:db8:abcd:51::2d7
183	2001:db8:abcd:51::2d8/126	2001:db8:abcd:51::2db
184	2001:db8:abcd:51::2dc/126	2001:db8:abcd:51::2df
185	2001:db8:abcd:51::2e0/126	2001:db8:abcd:51::2e3
186	2001:db8:abcd:51::2e4/126	2001:db8:abcd:51::2e7
187	2001:db8:abcd:51::2e8/126	2001:db8:abcd:51::2eb
188	2001:db8:abcd:51::2ec/126	2001:db8:abcd:51::2ef
189	2001:db8:abcd:51::2f0/126	2001:db8:abcd:51::2f3
190	2001:db8:abcd:51::2f4/126	2001:db8:abcd:51::2f7
191	2001:db8:abcd:51::2f8/126	2001:db8:abcd:51::2fb
192	2001:db8:abcd:51::2fc/126	2001:db8:abcd:51::2ff
193	2001:db8:abcd:51::300/126	2001:db8:abcd:51::303
194	2001:db8:abcd:51::304/126	2001:db8:abcd:51::307
195	2001:db8:abcd:51::308/126	2001:db8:abcd:51::30b
196	2001:db8:abcd:51::30c/126	2001:db8:abcd:51::30f
197	2001:db8:abcd:51::310/126	2001:db8:abcd:51::313
198	2001:db8:abcd:51::314/126	2001:db8:abcd:51::317
199	2001:db8:abcd:51::318/126	2001:db8:abcd:51::31b
200	2001:db8:abcd:51::31c/126	2001:db8:abcd:51::31f
201	2001:db8:abcd:51::320/126	2001:db8:abcd:51::323
202	2001:db8:abcd:51::324/126	2001:db8:abcd:51::327
203	2001:db8:abcd:51::328/126	2001:db8:abcd:51::32b
204	2001:db8:abcd:51::32c/126	2001:db8:abcd:51::32f
205	2001:db8:abcd:51::330/126	2001:db8:abcd:51::333
206	2001:db8:abcd:51::334/126	2001:db8:abcd:51::337
207	2001:db8:abcd:51::338/126	2001:db8:abcd:51::33b
208	2001:db8:abcd:51::33c/126	2001:db8:abcd:51::33f
209	2001:db8:abcd:51::340/126	2001:db8:abcd:51::343
210	2001:db8:abcd:51::344/126	2001:db8:abcd:51::347
211	2001:db8:abcd:51::348/126	2001:db8:abcd:51::34b
212	2001:db8:abcd:51::34c/126	2001:db8:abcd:51::34f
213	2001:db8:abcd:51::350/126	2001:db8:abcd:51::353
214	2001:db8:abcd:51::354/126	2001:db8:abcd:51::357
215	2001:db8:abcd:51::358/126	2001:db8:abcd:51::35b
216	2001:db8:abcd:51::35c/126	2001:db8:abcd:51::35f
217	2001:db8:abcd:51::360/126	2001:db8:abcd:51::363
218	2001:db8:abcd:51::364/126	2001:db8:abcd:51::367
219	2001:db8:abcd:51::368/126	2001:db8:abcd:51::36b
220	2001:db8:abcd:51::36c/126	2001:db8:abcd:51::36f
221	2001:db8:abcd:51::370/126	2001:db8:abcd:51::373
222	2001:db8:abcd:51::374/126	2001:db8:abcd:51::377
223	2001:db8:abcd:51::378/126	2001:db8:abcd:51::37b
224	2001:db8:abcd:51::37c/126	2001:db8:abcd:51::37f
225	2001:db8:abcd:51::380/126	2001:db8:abcd:51::383
226	2001:db8:abcd:51::384/126	2001:db8:abcd:51::387
227	2001:db8:abcd:51::388/126	2001:db8:abcd:51::38b
228	2001:db8:abcd:51::38c/126	2001:db8:abcd:51::38f
229	2001:db8:abcd:51::390/126	2001:db8:abcd:51::393
230	2001:db8:abcd:51::394/126	2001:db8:abcd:51::397
231	2001:db8:abcd:51::398/126	2001:db8:abcd:51::39b
232	2001:db8:abcd:51::39c/126	2001:db8:abcd:51::39f
233	2001:db8:abcd:51::3a0/126	2001:db8:abcd:51::3a3
234	2001:db8:abcd:51::3a4/126	2001:db8:abcd:51::3a7
235	2001:db8:abcd:51::3a8/126	2001:db8:abcd:51::3ab
236	2001:db8:abcd:51::3ac/126	2001:db8:abcd:51::3af
237	2001:db8:abcd:51::3b0/126	2001:db8:abcd:51::3b3
238	2001:db8:abcd:51::3b4/126	2001:db8:abcd:51::3b7
239	2001:db8:abcd:51::3b8/126	2001:db8:abcd:51::3bb
240	2001:db8:abcd:51::3bc/126	2001:db8:abcd:51::3bf
241	2001:db8:abcd:51::3c0/126	2001:db8:abcd:51::3c3
242	2001:db8:abcd:51::3c4/126	2001:db8:abcd:51::3c7
243	2001:db8:abcd:51::3c8/126	2001:db8:abcd:51::3cb
244	2001:db8:abcd:51::3cc/126	2001:db8:abcd:51::3cf
245	2001:db8:abcd:51::3d0/126	2001:db8:abcd:51::3d3
246	2001:db8:abcd:51::3d4/126	2001:db8:abcd:51::3d7
247	2001:db8:abcd:51::3d8/126	2001:db8:abcd:51::3db
248	2001:db8:abcd:51::3dc/126	2001:db8:abcd:51::3df
249	2001:db8:abcd:51::3e0/126	2001:db8:abcd:51::3e3
250	2001:db8:abcd:51::3e4/126	2001:db8:abcd:51::3e7
251	2001:db8:abcd:51::3e8/126	2001:db8:abcd:51::3eb
252	2001:db8:abcd:51::3ec/126	2001:db8:abcd:51::3ef
253	2001:db8:abcd:51::3f0/126	2001:db8:abcd:51::3f3
254	2001:db8:abcd:51::3f4/126	2001:db8:abcd:51::3f7
255	2001:db8:abcd:51::3f8/126	2001:db8:abcd:51::3fb
256	2001:db8:abcd:51::3fc/126	2001:db8:abcd:51::3ff

showing 256 of 4,611,686,018,427,387,904

01 / table

IPv6 prefix table.

Click a prefix longer than your network to split it into subnets.

prefix	addresses	/64 subnets	in your /64
/8	2¹²⁰	2⁵⁶	-
/12	2¹¹⁶	2⁵²	-
/16	2¹¹²	2⁴⁸	-
/20	2¹⁰⁸	2⁴⁴	-
/24	2¹⁰⁴	2⁴⁰	-
/28	2¹⁰⁰	2³⁶	-
/32	2⁹⁶	4,294,967,296	-
/36	2⁹²	268,435,456	-
/40	2⁸⁸	16,777,216	-
/44	2⁸⁴	1,048,576	-
/48	2⁸⁰	65,536	-
/52	2⁷⁶	4,096	-
/56	2⁷²	256	-
/60	2⁶⁸	16	-
/64	2⁶⁴	1	1
/72	2⁵⁶	-	256 split →
/80	2⁴⁸	-	65,536 split →
/96	4,294,967,296	-	4,294,967,296 split →
/112	65,536	-	2⁴⁸ split →
/120	256	-	2⁵⁶ split →
/124	16	-	2⁶⁰ split →
/126	4	-	2⁶² split →
/127	2	-	2⁶³ split →
/128	1	-	2⁶⁴ split →

02 / faq

About this calculator.

How do I use this IPv6 calculator?

▼

Type an IPv6 address followed by a prefix, like 2001:db8:abcd::1/48. Without a prefix it uses /64. The address can be written in full or shortened with ::.

Why does IPv6 have no broadcast address?

▼

IPv6 replaced broadcast with multicast, so no address is set aside for it. That is why this calculator shows the whole range, from the network address to the last address.

What prefix do ISPs usually hand out?

▼

A single LAN is almost always a /64. Home customers usually get a /56 or /60, and an organization or site usually gets a /48. One /48 holds 65,536 /64 subnets.

Learn how to work it out →