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:c800::/56

network2001:db8:abcd:c800::/56

first host2001:db8:abcd:c800::

last host2001:db8:abcd:c8ff:ffff:ffff:ffff:ffff

addresses2⁷² = 4,722,366,482,869,645,213,696

/64 subnets256

short form2001:db8:abcd:c800::

ipcalc 2001:db8:abcd:c800::/56

address2001:0db8:abcd:c800:0000:0000:0000:0000

network2001:0db8:abcd:c800:0000:0000:0000:0000

last host2001:0db8:abcd:c8ff:ffff:ffff:ffff:ffff

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

full form2001:0db8:abcd:c800:0000:0000:0000:0000

reverse dns0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.c.d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa

/56 split into /124 · 295,147,905,179,352,825,856 subnets

close ×

#	network	last address
1	2001:db8:abcd:c800::/124	2001:db8:abcd:c800::f
2	2001:db8:abcd:c800::10/124	2001:db8:abcd:c800::1f
3	2001:db8:abcd:c800::20/124	2001:db8:abcd:c800::2f
4	2001:db8:abcd:c800::30/124	2001:db8:abcd:c800::3f
5	2001:db8:abcd:c800::40/124	2001:db8:abcd:c800::4f
6	2001:db8:abcd:c800::50/124	2001:db8:abcd:c800::5f
7	2001:db8:abcd:c800::60/124	2001:db8:abcd:c800::6f
8	2001:db8:abcd:c800::70/124	2001:db8:abcd:c800::7f
9	2001:db8:abcd:c800::80/124	2001:db8:abcd:c800::8f
10	2001:db8:abcd:c800::90/124	2001:db8:abcd:c800::9f
11	2001:db8:abcd:c800::a0/124	2001:db8:abcd:c800::af
12	2001:db8:abcd:c800::b0/124	2001:db8:abcd:c800::bf
13	2001:db8:abcd:c800::c0/124	2001:db8:abcd:c800::cf
14	2001:db8:abcd:c800::d0/124	2001:db8:abcd:c800::df
15	2001:db8:abcd:c800::e0/124	2001:db8:abcd:c800::ef
16	2001:db8:abcd:c800::f0/124	2001:db8:abcd:c800::ff
17	2001:db8:abcd:c800::100/124	2001:db8:abcd:c800::10f
18	2001:db8:abcd:c800::110/124	2001:db8:abcd:c800::11f
19	2001:db8:abcd:c800::120/124	2001:db8:abcd:c800::12f
20	2001:db8:abcd:c800::130/124	2001:db8:abcd:c800::13f
21	2001:db8:abcd:c800::140/124	2001:db8:abcd:c800::14f
22	2001:db8:abcd:c800::150/124	2001:db8:abcd:c800::15f
23	2001:db8:abcd:c800::160/124	2001:db8:abcd:c800::16f
24	2001:db8:abcd:c800::170/124	2001:db8:abcd:c800::17f
25	2001:db8:abcd:c800::180/124	2001:db8:abcd:c800::18f
26	2001:db8:abcd:c800::190/124	2001:db8:abcd:c800::19f
27	2001:db8:abcd:c800::1a0/124	2001:db8:abcd:c800::1af
28	2001:db8:abcd:c800::1b0/124	2001:db8:abcd:c800::1bf
29	2001:db8:abcd:c800::1c0/124	2001:db8:abcd:c800::1cf
30	2001:db8:abcd:c800::1d0/124	2001:db8:abcd:c800::1df
31	2001:db8:abcd:c800::1e0/124	2001:db8:abcd:c800::1ef
32	2001:db8:abcd:c800::1f0/124	2001:db8:abcd:c800::1ff
33	2001:db8:abcd:c800::200/124	2001:db8:abcd:c800::20f
34	2001:db8:abcd:c800::210/124	2001:db8:abcd:c800::21f
35	2001:db8:abcd:c800::220/124	2001:db8:abcd:c800::22f
36	2001:db8:abcd:c800::230/124	2001:db8:abcd:c800::23f
37	2001:db8:abcd:c800::240/124	2001:db8:abcd:c800::24f
38	2001:db8:abcd:c800::250/124	2001:db8:abcd:c800::25f
39	2001:db8:abcd:c800::260/124	2001:db8:abcd:c800::26f
40	2001:db8:abcd:c800::270/124	2001:db8:abcd:c800::27f
41	2001:db8:abcd:c800::280/124	2001:db8:abcd:c800::28f
42	2001:db8:abcd:c800::290/124	2001:db8:abcd:c800::29f
43	2001:db8:abcd:c800::2a0/124	2001:db8:abcd:c800::2af
44	2001:db8:abcd:c800::2b0/124	2001:db8:abcd:c800::2bf
45	2001:db8:abcd:c800::2c0/124	2001:db8:abcd:c800::2cf
46	2001:db8:abcd:c800::2d0/124	2001:db8:abcd:c800::2df
47	2001:db8:abcd:c800::2e0/124	2001:db8:abcd:c800::2ef
48	2001:db8:abcd:c800::2f0/124	2001:db8:abcd:c800::2ff
49	2001:db8:abcd:c800::300/124	2001:db8:abcd:c800::30f
50	2001:db8:abcd:c800::310/124	2001:db8:abcd:c800::31f
51	2001:db8:abcd:c800::320/124	2001:db8:abcd:c800::32f
52	2001:db8:abcd:c800::330/124	2001:db8:abcd:c800::33f
53	2001:db8:abcd:c800::340/124	2001:db8:abcd:c800::34f
54	2001:db8:abcd:c800::350/124	2001:db8:abcd:c800::35f
55	2001:db8:abcd:c800::360/124	2001:db8:abcd:c800::36f
56	2001:db8:abcd:c800::370/124	2001:db8:abcd:c800::37f
57	2001:db8:abcd:c800::380/124	2001:db8:abcd:c800::38f
58	2001:db8:abcd:c800::390/124	2001:db8:abcd:c800::39f
59	2001:db8:abcd:c800::3a0/124	2001:db8:abcd:c800::3af
60	2001:db8:abcd:c800::3b0/124	2001:db8:abcd:c800::3bf
61	2001:db8:abcd:c800::3c0/124	2001:db8:abcd:c800::3cf
62	2001:db8:abcd:c800::3d0/124	2001:db8:abcd:c800::3df
63	2001:db8:abcd:c800::3e0/124	2001:db8:abcd:c800::3ef
64	2001:db8:abcd:c800::3f0/124	2001:db8:abcd:c800::3ff
65	2001:db8:abcd:c800::400/124	2001:db8:abcd:c800::40f
66	2001:db8:abcd:c800::410/124	2001:db8:abcd:c800::41f
67	2001:db8:abcd:c800::420/124	2001:db8:abcd:c800::42f
68	2001:db8:abcd:c800::430/124	2001:db8:abcd:c800::43f
69	2001:db8:abcd:c800::440/124	2001:db8:abcd:c800::44f
70	2001:db8:abcd:c800::450/124	2001:db8:abcd:c800::45f
71	2001:db8:abcd:c800::460/124	2001:db8:abcd:c800::46f
72	2001:db8:abcd:c800::470/124	2001:db8:abcd:c800::47f
73	2001:db8:abcd:c800::480/124	2001:db8:abcd:c800::48f
74	2001:db8:abcd:c800::490/124	2001:db8:abcd:c800::49f
75	2001:db8:abcd:c800::4a0/124	2001:db8:abcd:c800::4af
76	2001:db8:abcd:c800::4b0/124	2001:db8:abcd:c800::4bf
77	2001:db8:abcd:c800::4c0/124	2001:db8:abcd:c800::4cf
78	2001:db8:abcd:c800::4d0/124	2001:db8:abcd:c800::4df
79	2001:db8:abcd:c800::4e0/124	2001:db8:abcd:c800::4ef
80	2001:db8:abcd:c800::4f0/124	2001:db8:abcd:c800::4ff
81	2001:db8:abcd:c800::500/124	2001:db8:abcd:c800::50f
82	2001:db8:abcd:c800::510/124	2001:db8:abcd:c800::51f
83	2001:db8:abcd:c800::520/124	2001:db8:abcd:c800::52f
84	2001:db8:abcd:c800::530/124	2001:db8:abcd:c800::53f
85	2001:db8:abcd:c800::540/124	2001:db8:abcd:c800::54f
86	2001:db8:abcd:c800::550/124	2001:db8:abcd:c800::55f
87	2001:db8:abcd:c800::560/124	2001:db8:abcd:c800::56f
88	2001:db8:abcd:c800::570/124	2001:db8:abcd:c800::57f
89	2001:db8:abcd:c800::580/124	2001:db8:abcd:c800::58f
90	2001:db8:abcd:c800::590/124	2001:db8:abcd:c800::59f
91	2001:db8:abcd:c800::5a0/124	2001:db8:abcd:c800::5af
92	2001:db8:abcd:c800::5b0/124	2001:db8:abcd:c800::5bf
93	2001:db8:abcd:c800::5c0/124	2001:db8:abcd:c800::5cf
94	2001:db8:abcd:c800::5d0/124	2001:db8:abcd:c800::5df
95	2001:db8:abcd:c800::5e0/124	2001:db8:abcd:c800::5ef
96	2001:db8:abcd:c800::5f0/124	2001:db8:abcd:c800::5ff
97	2001:db8:abcd:c800::600/124	2001:db8:abcd:c800::60f
98	2001:db8:abcd:c800::610/124	2001:db8:abcd:c800::61f
99	2001:db8:abcd:c800::620/124	2001:db8:abcd:c800::62f
100	2001:db8:abcd:c800::630/124	2001:db8:abcd:c800::63f
101	2001:db8:abcd:c800::640/124	2001:db8:abcd:c800::64f
102	2001:db8:abcd:c800::650/124	2001:db8:abcd:c800::65f
103	2001:db8:abcd:c800::660/124	2001:db8:abcd:c800::66f
104	2001:db8:abcd:c800::670/124	2001:db8:abcd:c800::67f
105	2001:db8:abcd:c800::680/124	2001:db8:abcd:c800::68f
106	2001:db8:abcd:c800::690/124	2001:db8:abcd:c800::69f
107	2001:db8:abcd:c800::6a0/124	2001:db8:abcd:c800::6af
108	2001:db8:abcd:c800::6b0/124	2001:db8:abcd:c800::6bf
109	2001:db8:abcd:c800::6c0/124	2001:db8:abcd:c800::6cf
110	2001:db8:abcd:c800::6d0/124	2001:db8:abcd:c800::6df
111	2001:db8:abcd:c800::6e0/124	2001:db8:abcd:c800::6ef
112	2001:db8:abcd:c800::6f0/124	2001:db8:abcd:c800::6ff
113	2001:db8:abcd:c800::700/124	2001:db8:abcd:c800::70f
114	2001:db8:abcd:c800::710/124	2001:db8:abcd:c800::71f
115	2001:db8:abcd:c800::720/124	2001:db8:abcd:c800::72f
116	2001:db8:abcd:c800::730/124	2001:db8:abcd:c800::73f
117	2001:db8:abcd:c800::740/124	2001:db8:abcd:c800::74f
118	2001:db8:abcd:c800::750/124	2001:db8:abcd:c800::75f
119	2001:db8:abcd:c800::760/124	2001:db8:abcd:c800::76f
120	2001:db8:abcd:c800::770/124	2001:db8:abcd:c800::77f
121	2001:db8:abcd:c800::780/124	2001:db8:abcd:c800::78f
122	2001:db8:abcd:c800::790/124	2001:db8:abcd:c800::79f
123	2001:db8:abcd:c800::7a0/124	2001:db8:abcd:c800::7af
124	2001:db8:abcd:c800::7b0/124	2001:db8:abcd:c800::7bf
125	2001:db8:abcd:c800::7c0/124	2001:db8:abcd:c800::7cf
126	2001:db8:abcd:c800::7d0/124	2001:db8:abcd:c800::7df
127	2001:db8:abcd:c800::7e0/124	2001:db8:abcd:c800::7ef
128	2001:db8:abcd:c800::7f0/124	2001:db8:abcd:c800::7ff
129	2001:db8:abcd:c800::800/124	2001:db8:abcd:c800::80f
130	2001:db8:abcd:c800::810/124	2001:db8:abcd:c800::81f
131	2001:db8:abcd:c800::820/124	2001:db8:abcd:c800::82f
132	2001:db8:abcd:c800::830/124	2001:db8:abcd:c800::83f
133	2001:db8:abcd:c800::840/124	2001:db8:abcd:c800::84f
134	2001:db8:abcd:c800::850/124	2001:db8:abcd:c800::85f
135	2001:db8:abcd:c800::860/124	2001:db8:abcd:c800::86f
136	2001:db8:abcd:c800::870/124	2001:db8:abcd:c800::87f
137	2001:db8:abcd:c800::880/124	2001:db8:abcd:c800::88f
138	2001:db8:abcd:c800::890/124	2001:db8:abcd:c800::89f
139	2001:db8:abcd:c800::8a0/124	2001:db8:abcd:c800::8af
140	2001:db8:abcd:c800::8b0/124	2001:db8:abcd:c800::8bf
141	2001:db8:abcd:c800::8c0/124	2001:db8:abcd:c800::8cf
142	2001:db8:abcd:c800::8d0/124	2001:db8:abcd:c800::8df
143	2001:db8:abcd:c800::8e0/124	2001:db8:abcd:c800::8ef
144	2001:db8:abcd:c800::8f0/124	2001:db8:abcd:c800::8ff
145	2001:db8:abcd:c800::900/124	2001:db8:abcd:c800::90f
146	2001:db8:abcd:c800::910/124	2001:db8:abcd:c800::91f
147	2001:db8:abcd:c800::920/124	2001:db8:abcd:c800::92f
148	2001:db8:abcd:c800::930/124	2001:db8:abcd:c800::93f
149	2001:db8:abcd:c800::940/124	2001:db8:abcd:c800::94f
150	2001:db8:abcd:c800::950/124	2001:db8:abcd:c800::95f
151	2001:db8:abcd:c800::960/124	2001:db8:abcd:c800::96f
152	2001:db8:abcd:c800::970/124	2001:db8:abcd:c800::97f
153	2001:db8:abcd:c800::980/124	2001:db8:abcd:c800::98f
154	2001:db8:abcd:c800::990/124	2001:db8:abcd:c800::99f
155	2001:db8:abcd:c800::9a0/124	2001:db8:abcd:c800::9af
156	2001:db8:abcd:c800::9b0/124	2001:db8:abcd:c800::9bf
157	2001:db8:abcd:c800::9c0/124	2001:db8:abcd:c800::9cf
158	2001:db8:abcd:c800::9d0/124	2001:db8:abcd:c800::9df
159	2001:db8:abcd:c800::9e0/124	2001:db8:abcd:c800::9ef
160	2001:db8:abcd:c800::9f0/124	2001:db8:abcd:c800::9ff
161	2001:db8:abcd:c800::a00/124	2001:db8:abcd:c800::a0f
162	2001:db8:abcd:c800::a10/124	2001:db8:abcd:c800::a1f
163	2001:db8:abcd:c800::a20/124	2001:db8:abcd:c800::a2f
164	2001:db8:abcd:c800::a30/124	2001:db8:abcd:c800::a3f
165	2001:db8:abcd:c800::a40/124	2001:db8:abcd:c800::a4f
166	2001:db8:abcd:c800::a50/124	2001:db8:abcd:c800::a5f
167	2001:db8:abcd:c800::a60/124	2001:db8:abcd:c800::a6f
168	2001:db8:abcd:c800::a70/124	2001:db8:abcd:c800::a7f
169	2001:db8:abcd:c800::a80/124	2001:db8:abcd:c800::a8f
170	2001:db8:abcd:c800::a90/124	2001:db8:abcd:c800::a9f
171	2001:db8:abcd:c800::aa0/124	2001:db8:abcd:c800::aaf
172	2001:db8:abcd:c800::ab0/124	2001:db8:abcd:c800::abf
173	2001:db8:abcd:c800::ac0/124	2001:db8:abcd:c800::acf
174	2001:db8:abcd:c800::ad0/124	2001:db8:abcd:c800::adf
175	2001:db8:abcd:c800::ae0/124	2001:db8:abcd:c800::aef
176	2001:db8:abcd:c800::af0/124	2001:db8:abcd:c800::aff
177	2001:db8:abcd:c800::b00/124	2001:db8:abcd:c800::b0f
178	2001:db8:abcd:c800::b10/124	2001:db8:abcd:c800::b1f
179	2001:db8:abcd:c800::b20/124	2001:db8:abcd:c800::b2f
180	2001:db8:abcd:c800::b30/124	2001:db8:abcd:c800::b3f
181	2001:db8:abcd:c800::b40/124	2001:db8:abcd:c800::b4f
182	2001:db8:abcd:c800::b50/124	2001:db8:abcd:c800::b5f
183	2001:db8:abcd:c800::b60/124	2001:db8:abcd:c800::b6f
184	2001:db8:abcd:c800::b70/124	2001:db8:abcd:c800::b7f
185	2001:db8:abcd:c800::b80/124	2001:db8:abcd:c800::b8f
186	2001:db8:abcd:c800::b90/124	2001:db8:abcd:c800::b9f
187	2001:db8:abcd:c800::ba0/124	2001:db8:abcd:c800::baf
188	2001:db8:abcd:c800::bb0/124	2001:db8:abcd:c800::bbf
189	2001:db8:abcd:c800::bc0/124	2001:db8:abcd:c800::bcf
190	2001:db8:abcd:c800::bd0/124	2001:db8:abcd:c800::bdf
191	2001:db8:abcd:c800::be0/124	2001:db8:abcd:c800::bef
192	2001:db8:abcd:c800::bf0/124	2001:db8:abcd:c800::bff
193	2001:db8:abcd:c800::c00/124	2001:db8:abcd:c800::c0f
194	2001:db8:abcd:c800::c10/124	2001:db8:abcd:c800::c1f
195	2001:db8:abcd:c800::c20/124	2001:db8:abcd:c800::c2f
196	2001:db8:abcd:c800::c30/124	2001:db8:abcd:c800::c3f
197	2001:db8:abcd:c800::c40/124	2001:db8:abcd:c800::c4f
198	2001:db8:abcd:c800::c50/124	2001:db8:abcd:c800::c5f
199	2001:db8:abcd:c800::c60/124	2001:db8:abcd:c800::c6f
200	2001:db8:abcd:c800::c70/124	2001:db8:abcd:c800::c7f
201	2001:db8:abcd:c800::c80/124	2001:db8:abcd:c800::c8f
202	2001:db8:abcd:c800::c90/124	2001:db8:abcd:c800::c9f
203	2001:db8:abcd:c800::ca0/124	2001:db8:abcd:c800::caf
204	2001:db8:abcd:c800::cb0/124	2001:db8:abcd:c800::cbf
205	2001:db8:abcd:c800::cc0/124	2001:db8:abcd:c800::ccf
206	2001:db8:abcd:c800::cd0/124	2001:db8:abcd:c800::cdf
207	2001:db8:abcd:c800::ce0/124	2001:db8:abcd:c800::cef
208	2001:db8:abcd:c800::cf0/124	2001:db8:abcd:c800::cff
209	2001:db8:abcd:c800::d00/124	2001:db8:abcd:c800::d0f
210	2001:db8:abcd:c800::d10/124	2001:db8:abcd:c800::d1f
211	2001:db8:abcd:c800::d20/124	2001:db8:abcd:c800::d2f
212	2001:db8:abcd:c800::d30/124	2001:db8:abcd:c800::d3f
213	2001:db8:abcd:c800::d40/124	2001:db8:abcd:c800::d4f
214	2001:db8:abcd:c800::d50/124	2001:db8:abcd:c800::d5f
215	2001:db8:abcd:c800::d60/124	2001:db8:abcd:c800::d6f
216	2001:db8:abcd:c800::d70/124	2001:db8:abcd:c800::d7f
217	2001:db8:abcd:c800::d80/124	2001:db8:abcd:c800::d8f
218	2001:db8:abcd:c800::d90/124	2001:db8:abcd:c800::d9f
219	2001:db8:abcd:c800::da0/124	2001:db8:abcd:c800::daf
220	2001:db8:abcd:c800::db0/124	2001:db8:abcd:c800::dbf
221	2001:db8:abcd:c800::dc0/124	2001:db8:abcd:c800::dcf
222	2001:db8:abcd:c800::dd0/124	2001:db8:abcd:c800::ddf
223	2001:db8:abcd:c800::de0/124	2001:db8:abcd:c800::def
224	2001:db8:abcd:c800::df0/124	2001:db8:abcd:c800::dff
225	2001:db8:abcd:c800::e00/124	2001:db8:abcd:c800::e0f
226	2001:db8:abcd:c800::e10/124	2001:db8:abcd:c800::e1f
227	2001:db8:abcd:c800::e20/124	2001:db8:abcd:c800::e2f
228	2001:db8:abcd:c800::e30/124	2001:db8:abcd:c800::e3f
229	2001:db8:abcd:c800::e40/124	2001:db8:abcd:c800::e4f
230	2001:db8:abcd:c800::e50/124	2001:db8:abcd:c800::e5f
231	2001:db8:abcd:c800::e60/124	2001:db8:abcd:c800::e6f
232	2001:db8:abcd:c800::e70/124	2001:db8:abcd:c800::e7f
233	2001:db8:abcd:c800::e80/124	2001:db8:abcd:c800::e8f
234	2001:db8:abcd:c800::e90/124	2001:db8:abcd:c800::e9f
235	2001:db8:abcd:c800::ea0/124	2001:db8:abcd:c800::eaf
236	2001:db8:abcd:c800::eb0/124	2001:db8:abcd:c800::ebf
237	2001:db8:abcd:c800::ec0/124	2001:db8:abcd:c800::ecf
238	2001:db8:abcd:c800::ed0/124	2001:db8:abcd:c800::edf
239	2001:db8:abcd:c800::ee0/124	2001:db8:abcd:c800::eef
240	2001:db8:abcd:c800::ef0/124	2001:db8:abcd:c800::eff
241	2001:db8:abcd:c800::f00/124	2001:db8:abcd:c800::f0f
242	2001:db8:abcd:c800::f10/124	2001:db8:abcd:c800::f1f
243	2001:db8:abcd:c800::f20/124	2001:db8:abcd:c800::f2f
244	2001:db8:abcd:c800::f30/124	2001:db8:abcd:c800::f3f
245	2001:db8:abcd:c800::f40/124	2001:db8:abcd:c800::f4f
246	2001:db8:abcd:c800::f50/124	2001:db8:abcd:c800::f5f
247	2001:db8:abcd:c800::f60/124	2001:db8:abcd:c800::f6f
248	2001:db8:abcd:c800::f70/124	2001:db8:abcd:c800::f7f
249	2001:db8:abcd:c800::f80/124	2001:db8:abcd:c800::f8f
250	2001:db8:abcd:c800::f90/124	2001:db8:abcd:c800::f9f
251	2001:db8:abcd:c800::fa0/124	2001:db8:abcd:c800::faf
252	2001:db8:abcd:c800::fb0/124	2001:db8:abcd:c800::fbf
253	2001:db8:abcd:c800::fc0/124	2001:db8:abcd:c800::fcf
254	2001:db8:abcd:c800::fd0/124	2001:db8:abcd:c800::fdf
255	2001:db8:abcd:c800::fe0/124	2001:db8:abcd:c800::fef
256	2001:db8:abcd:c800::ff0/124	2001:db8:abcd:c800::fff

showing 256 of 295,147,905,179,352,825,856

01 / table

IPv6 prefix table.

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

prefix	addresses	/64 subnets	in your /56
/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	1
/60	2⁶⁸	16	16 split →
/64	2⁶⁴	1	256 split →
/72	2⁵⁶	-	65,536 split →
/80	2⁴⁸	-	16,777,216 split →
/96	4,294,967,296	-	2⁴⁰ split →
/112	65,536	-	2⁵⁶ split →
/120	256	-	2⁶⁴ split →
/124	16	-	2⁶⁸ split →
/126	4	-	2⁷⁰ split →
/127	2	-	2⁷¹ split →
/128	1	-	2⁷² 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 →