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:a20::/60

network2001:db8:abcd:a20::/60

first host2001:db8:abcd:a20::

last host2001:db8:abcd:a2f:ffff:ffff:ffff:ffff

addresses2⁶⁸ = 295,147,905,179,352,825,856

/64 subnets16

short form2001:db8:abcd:a20::

ipcalc 2001:db8:abcd:a20::/60

address2001:0db8:abcd:0a20:0000:0000:0000:0000

network2001:0db8:abcd:0a20:0000:0000:0000:0000

last host2001:0db8:abcd:0a2f:ffff:ffff:ffff:ffff

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

full form2001:0db8:abcd:0a20:0000:0000:0000:0000

reverse dns0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.a.0.d.c.b.a.8.b.d.0.1.0.0.2.ip6.arpa

/60 split into /128 · 295,147,905,179,352,825,856 subnets

close ×

#	network	last address
1	2001:db8:abcd:a20::/128	2001:db8:abcd:a20::
2	2001:db8:abcd:a20::1/128	2001:db8:abcd:a20::1
3	2001:db8:abcd:a20::2/128	2001:db8:abcd:a20::2
4	2001:db8:abcd:a20::3/128	2001:db8:abcd:a20::3
5	2001:db8:abcd:a20::4/128	2001:db8:abcd:a20::4
6	2001:db8:abcd:a20::5/128	2001:db8:abcd:a20::5
7	2001:db8:abcd:a20::6/128	2001:db8:abcd:a20::6
8	2001:db8:abcd:a20::7/128	2001:db8:abcd:a20::7
9	2001:db8:abcd:a20::8/128	2001:db8:abcd:a20::8
10	2001:db8:abcd:a20::9/128	2001:db8:abcd:a20::9
11	2001:db8:abcd:a20::a/128	2001:db8:abcd:a20::a
12	2001:db8:abcd:a20::b/128	2001:db8:abcd:a20::b
13	2001:db8:abcd:a20::c/128	2001:db8:abcd:a20::c
14	2001:db8:abcd:a20::d/128	2001:db8:abcd:a20::d
15	2001:db8:abcd:a20::e/128	2001:db8:abcd:a20::e
16	2001:db8:abcd:a20::f/128	2001:db8:abcd:a20::f
17	2001:db8:abcd:a20::10/128	2001:db8:abcd:a20::10
18	2001:db8:abcd:a20::11/128	2001:db8:abcd:a20::11
19	2001:db8:abcd:a20::12/128	2001:db8:abcd:a20::12
20	2001:db8:abcd:a20::13/128	2001:db8:abcd:a20::13
21	2001:db8:abcd:a20::14/128	2001:db8:abcd:a20::14
22	2001:db8:abcd:a20::15/128	2001:db8:abcd:a20::15
23	2001:db8:abcd:a20::16/128	2001:db8:abcd:a20::16
24	2001:db8:abcd:a20::17/128	2001:db8:abcd:a20::17
25	2001:db8:abcd:a20::18/128	2001:db8:abcd:a20::18
26	2001:db8:abcd:a20::19/128	2001:db8:abcd:a20::19
27	2001:db8:abcd:a20::1a/128	2001:db8:abcd:a20::1a
28	2001:db8:abcd:a20::1b/128	2001:db8:abcd:a20::1b
29	2001:db8:abcd:a20::1c/128	2001:db8:abcd:a20::1c
30	2001:db8:abcd:a20::1d/128	2001:db8:abcd:a20::1d
31	2001:db8:abcd:a20::1e/128	2001:db8:abcd:a20::1e
32	2001:db8:abcd:a20::1f/128	2001:db8:abcd:a20::1f
33	2001:db8:abcd:a20::20/128	2001:db8:abcd:a20::20
34	2001:db8:abcd:a20::21/128	2001:db8:abcd:a20::21
35	2001:db8:abcd:a20::22/128	2001:db8:abcd:a20::22
36	2001:db8:abcd:a20::23/128	2001:db8:abcd:a20::23
37	2001:db8:abcd:a20::24/128	2001:db8:abcd:a20::24
38	2001:db8:abcd:a20::25/128	2001:db8:abcd:a20::25
39	2001:db8:abcd:a20::26/128	2001:db8:abcd:a20::26
40	2001:db8:abcd:a20::27/128	2001:db8:abcd:a20::27
41	2001:db8:abcd:a20::28/128	2001:db8:abcd:a20::28
42	2001:db8:abcd:a20::29/128	2001:db8:abcd:a20::29
43	2001:db8:abcd:a20::2a/128	2001:db8:abcd:a20::2a
44	2001:db8:abcd:a20::2b/128	2001:db8:abcd:a20::2b
45	2001:db8:abcd:a20::2c/128	2001:db8:abcd:a20::2c
46	2001:db8:abcd:a20::2d/128	2001:db8:abcd:a20::2d
47	2001:db8:abcd:a20::2e/128	2001:db8:abcd:a20::2e
48	2001:db8:abcd:a20::2f/128	2001:db8:abcd:a20::2f
49	2001:db8:abcd:a20::30/128	2001:db8:abcd:a20::30
50	2001:db8:abcd:a20::31/128	2001:db8:abcd:a20::31
51	2001:db8:abcd:a20::32/128	2001:db8:abcd:a20::32
52	2001:db8:abcd:a20::33/128	2001:db8:abcd:a20::33
53	2001:db8:abcd:a20::34/128	2001:db8:abcd:a20::34
54	2001:db8:abcd:a20::35/128	2001:db8:abcd:a20::35
55	2001:db8:abcd:a20::36/128	2001:db8:abcd:a20::36
56	2001:db8:abcd:a20::37/128	2001:db8:abcd:a20::37
57	2001:db8:abcd:a20::38/128	2001:db8:abcd:a20::38
58	2001:db8:abcd:a20::39/128	2001:db8:abcd:a20::39
59	2001:db8:abcd:a20::3a/128	2001:db8:abcd:a20::3a
60	2001:db8:abcd:a20::3b/128	2001:db8:abcd:a20::3b
61	2001:db8:abcd:a20::3c/128	2001:db8:abcd:a20::3c
62	2001:db8:abcd:a20::3d/128	2001:db8:abcd:a20::3d
63	2001:db8:abcd:a20::3e/128	2001:db8:abcd:a20::3e
64	2001:db8:abcd:a20::3f/128	2001:db8:abcd:a20::3f
65	2001:db8:abcd:a20::40/128	2001:db8:abcd:a20::40
66	2001:db8:abcd:a20::41/128	2001:db8:abcd:a20::41
67	2001:db8:abcd:a20::42/128	2001:db8:abcd:a20::42
68	2001:db8:abcd:a20::43/128	2001:db8:abcd:a20::43
69	2001:db8:abcd:a20::44/128	2001:db8:abcd:a20::44
70	2001:db8:abcd:a20::45/128	2001:db8:abcd:a20::45
71	2001:db8:abcd:a20::46/128	2001:db8:abcd:a20::46
72	2001:db8:abcd:a20::47/128	2001:db8:abcd:a20::47
73	2001:db8:abcd:a20::48/128	2001:db8:abcd:a20::48
74	2001:db8:abcd:a20::49/128	2001:db8:abcd:a20::49
75	2001:db8:abcd:a20::4a/128	2001:db8:abcd:a20::4a
76	2001:db8:abcd:a20::4b/128	2001:db8:abcd:a20::4b
77	2001:db8:abcd:a20::4c/128	2001:db8:abcd:a20::4c
78	2001:db8:abcd:a20::4d/128	2001:db8:abcd:a20::4d
79	2001:db8:abcd:a20::4e/128	2001:db8:abcd:a20::4e
80	2001:db8:abcd:a20::4f/128	2001:db8:abcd:a20::4f
81	2001:db8:abcd:a20::50/128	2001:db8:abcd:a20::50
82	2001:db8:abcd:a20::51/128	2001:db8:abcd:a20::51
83	2001:db8:abcd:a20::52/128	2001:db8:abcd:a20::52
84	2001:db8:abcd:a20::53/128	2001:db8:abcd:a20::53
85	2001:db8:abcd:a20::54/128	2001:db8:abcd:a20::54
86	2001:db8:abcd:a20::55/128	2001:db8:abcd:a20::55
87	2001:db8:abcd:a20::56/128	2001:db8:abcd:a20::56
88	2001:db8:abcd:a20::57/128	2001:db8:abcd:a20::57
89	2001:db8:abcd:a20::58/128	2001:db8:abcd:a20::58
90	2001:db8:abcd:a20::59/128	2001:db8:abcd:a20::59
91	2001:db8:abcd:a20::5a/128	2001:db8:abcd:a20::5a
92	2001:db8:abcd:a20::5b/128	2001:db8:abcd:a20::5b
93	2001:db8:abcd:a20::5c/128	2001:db8:abcd:a20::5c
94	2001:db8:abcd:a20::5d/128	2001:db8:abcd:a20::5d
95	2001:db8:abcd:a20::5e/128	2001:db8:abcd:a20::5e
96	2001:db8:abcd:a20::5f/128	2001:db8:abcd:a20::5f
97	2001:db8:abcd:a20::60/128	2001:db8:abcd:a20::60
98	2001:db8:abcd:a20::61/128	2001:db8:abcd:a20::61
99	2001:db8:abcd:a20::62/128	2001:db8:abcd:a20::62
100	2001:db8:abcd:a20::63/128	2001:db8:abcd:a20::63
101	2001:db8:abcd:a20::64/128	2001:db8:abcd:a20::64
102	2001:db8:abcd:a20::65/128	2001:db8:abcd:a20::65
103	2001:db8:abcd:a20::66/128	2001:db8:abcd:a20::66
104	2001:db8:abcd:a20::67/128	2001:db8:abcd:a20::67
105	2001:db8:abcd:a20::68/128	2001:db8:abcd:a20::68
106	2001:db8:abcd:a20::69/128	2001:db8:abcd:a20::69
107	2001:db8:abcd:a20::6a/128	2001:db8:abcd:a20::6a
108	2001:db8:abcd:a20::6b/128	2001:db8:abcd:a20::6b
109	2001:db8:abcd:a20::6c/128	2001:db8:abcd:a20::6c
110	2001:db8:abcd:a20::6d/128	2001:db8:abcd:a20::6d
111	2001:db8:abcd:a20::6e/128	2001:db8:abcd:a20::6e
112	2001:db8:abcd:a20::6f/128	2001:db8:abcd:a20::6f
113	2001:db8:abcd:a20::70/128	2001:db8:abcd:a20::70
114	2001:db8:abcd:a20::71/128	2001:db8:abcd:a20::71
115	2001:db8:abcd:a20::72/128	2001:db8:abcd:a20::72
116	2001:db8:abcd:a20::73/128	2001:db8:abcd:a20::73
117	2001:db8:abcd:a20::74/128	2001:db8:abcd:a20::74
118	2001:db8:abcd:a20::75/128	2001:db8:abcd:a20::75
119	2001:db8:abcd:a20::76/128	2001:db8:abcd:a20::76
120	2001:db8:abcd:a20::77/128	2001:db8:abcd:a20::77
121	2001:db8:abcd:a20::78/128	2001:db8:abcd:a20::78
122	2001:db8:abcd:a20::79/128	2001:db8:abcd:a20::79
123	2001:db8:abcd:a20::7a/128	2001:db8:abcd:a20::7a
124	2001:db8:abcd:a20::7b/128	2001:db8:abcd:a20::7b
125	2001:db8:abcd:a20::7c/128	2001:db8:abcd:a20::7c
126	2001:db8:abcd:a20::7d/128	2001:db8:abcd:a20::7d
127	2001:db8:abcd:a20::7e/128	2001:db8:abcd:a20::7e
128	2001:db8:abcd:a20::7f/128	2001:db8:abcd:a20::7f
129	2001:db8:abcd:a20::80/128	2001:db8:abcd:a20::80
130	2001:db8:abcd:a20::81/128	2001:db8:abcd:a20::81
131	2001:db8:abcd:a20::82/128	2001:db8:abcd:a20::82
132	2001:db8:abcd:a20::83/128	2001:db8:abcd:a20::83
133	2001:db8:abcd:a20::84/128	2001:db8:abcd:a20::84
134	2001:db8:abcd:a20::85/128	2001:db8:abcd:a20::85
135	2001:db8:abcd:a20::86/128	2001:db8:abcd:a20::86
136	2001:db8:abcd:a20::87/128	2001:db8:abcd:a20::87
137	2001:db8:abcd:a20::88/128	2001:db8:abcd:a20::88
138	2001:db8:abcd:a20::89/128	2001:db8:abcd:a20::89
139	2001:db8:abcd:a20::8a/128	2001:db8:abcd:a20::8a
140	2001:db8:abcd:a20::8b/128	2001:db8:abcd:a20::8b
141	2001:db8:abcd:a20::8c/128	2001:db8:abcd:a20::8c
142	2001:db8:abcd:a20::8d/128	2001:db8:abcd:a20::8d
143	2001:db8:abcd:a20::8e/128	2001:db8:abcd:a20::8e
144	2001:db8:abcd:a20::8f/128	2001:db8:abcd:a20::8f
145	2001:db8:abcd:a20::90/128	2001:db8:abcd:a20::90
146	2001:db8:abcd:a20::91/128	2001:db8:abcd:a20::91
147	2001:db8:abcd:a20::92/128	2001:db8:abcd:a20::92
148	2001:db8:abcd:a20::93/128	2001:db8:abcd:a20::93
149	2001:db8:abcd:a20::94/128	2001:db8:abcd:a20::94
150	2001:db8:abcd:a20::95/128	2001:db8:abcd:a20::95
151	2001:db8:abcd:a20::96/128	2001:db8:abcd:a20::96
152	2001:db8:abcd:a20::97/128	2001:db8:abcd:a20::97
153	2001:db8:abcd:a20::98/128	2001:db8:abcd:a20::98
154	2001:db8:abcd:a20::99/128	2001:db8:abcd:a20::99
155	2001:db8:abcd:a20::9a/128	2001:db8:abcd:a20::9a
156	2001:db8:abcd:a20::9b/128	2001:db8:abcd:a20::9b
157	2001:db8:abcd:a20::9c/128	2001:db8:abcd:a20::9c
158	2001:db8:abcd:a20::9d/128	2001:db8:abcd:a20::9d
159	2001:db8:abcd:a20::9e/128	2001:db8:abcd:a20::9e
160	2001:db8:abcd:a20::9f/128	2001:db8:abcd:a20::9f
161	2001:db8:abcd:a20::a0/128	2001:db8:abcd:a20::a0
162	2001:db8:abcd:a20::a1/128	2001:db8:abcd:a20::a1
163	2001:db8:abcd:a20::a2/128	2001:db8:abcd:a20::a2
164	2001:db8:abcd:a20::a3/128	2001:db8:abcd:a20::a3
165	2001:db8:abcd:a20::a4/128	2001:db8:abcd:a20::a4
166	2001:db8:abcd:a20::a5/128	2001:db8:abcd:a20::a5
167	2001:db8:abcd:a20::a6/128	2001:db8:abcd:a20::a6
168	2001:db8:abcd:a20::a7/128	2001:db8:abcd:a20::a7
169	2001:db8:abcd:a20::a8/128	2001:db8:abcd:a20::a8
170	2001:db8:abcd:a20::a9/128	2001:db8:abcd:a20::a9
171	2001:db8:abcd:a20::aa/128	2001:db8:abcd:a20::aa
172	2001:db8:abcd:a20::ab/128	2001:db8:abcd:a20::ab
173	2001:db8:abcd:a20::ac/128	2001:db8:abcd:a20::ac
174	2001:db8:abcd:a20::ad/128	2001:db8:abcd:a20::ad
175	2001:db8:abcd:a20::ae/128	2001:db8:abcd:a20::ae
176	2001:db8:abcd:a20::af/128	2001:db8:abcd:a20::af
177	2001:db8:abcd:a20::b0/128	2001:db8:abcd:a20::b0
178	2001:db8:abcd:a20::b1/128	2001:db8:abcd:a20::b1
179	2001:db8:abcd:a20::b2/128	2001:db8:abcd:a20::b2
180	2001:db8:abcd:a20::b3/128	2001:db8:abcd:a20::b3
181	2001:db8:abcd:a20::b4/128	2001:db8:abcd:a20::b4
182	2001:db8:abcd:a20::b5/128	2001:db8:abcd:a20::b5
183	2001:db8:abcd:a20::b6/128	2001:db8:abcd:a20::b6
184	2001:db8:abcd:a20::b7/128	2001:db8:abcd:a20::b7
185	2001:db8:abcd:a20::b8/128	2001:db8:abcd:a20::b8
186	2001:db8:abcd:a20::b9/128	2001:db8:abcd:a20::b9
187	2001:db8:abcd:a20::ba/128	2001:db8:abcd:a20::ba
188	2001:db8:abcd:a20::bb/128	2001:db8:abcd:a20::bb
189	2001:db8:abcd:a20::bc/128	2001:db8:abcd:a20::bc
190	2001:db8:abcd:a20::bd/128	2001:db8:abcd:a20::bd
191	2001:db8:abcd:a20::be/128	2001:db8:abcd:a20::be
192	2001:db8:abcd:a20::bf/128	2001:db8:abcd:a20::bf
193	2001:db8:abcd:a20::c0/128	2001:db8:abcd:a20::c0
194	2001:db8:abcd:a20::c1/128	2001:db8:abcd:a20::c1
195	2001:db8:abcd:a20::c2/128	2001:db8:abcd:a20::c2
196	2001:db8:abcd:a20::c3/128	2001:db8:abcd:a20::c3
197	2001:db8:abcd:a20::c4/128	2001:db8:abcd:a20::c4
198	2001:db8:abcd:a20::c5/128	2001:db8:abcd:a20::c5
199	2001:db8:abcd:a20::c6/128	2001:db8:abcd:a20::c6
200	2001:db8:abcd:a20::c7/128	2001:db8:abcd:a20::c7
201	2001:db8:abcd:a20::c8/128	2001:db8:abcd:a20::c8
202	2001:db8:abcd:a20::c9/128	2001:db8:abcd:a20::c9
203	2001:db8:abcd:a20::ca/128	2001:db8:abcd:a20::ca
204	2001:db8:abcd:a20::cb/128	2001:db8:abcd:a20::cb
205	2001:db8:abcd:a20::cc/128	2001:db8:abcd:a20::cc
206	2001:db8:abcd:a20::cd/128	2001:db8:abcd:a20::cd
207	2001:db8:abcd:a20::ce/128	2001:db8:abcd:a20::ce
208	2001:db8:abcd:a20::cf/128	2001:db8:abcd:a20::cf
209	2001:db8:abcd:a20::d0/128	2001:db8:abcd:a20::d0
210	2001:db8:abcd:a20::d1/128	2001:db8:abcd:a20::d1
211	2001:db8:abcd:a20::d2/128	2001:db8:abcd:a20::d2
212	2001:db8:abcd:a20::d3/128	2001:db8:abcd:a20::d3
213	2001:db8:abcd:a20::d4/128	2001:db8:abcd:a20::d4
214	2001:db8:abcd:a20::d5/128	2001:db8:abcd:a20::d5
215	2001:db8:abcd:a20::d6/128	2001:db8:abcd:a20::d6
216	2001:db8:abcd:a20::d7/128	2001:db8:abcd:a20::d7
217	2001:db8:abcd:a20::d8/128	2001:db8:abcd:a20::d8
218	2001:db8:abcd:a20::d9/128	2001:db8:abcd:a20::d9
219	2001:db8:abcd:a20::da/128	2001:db8:abcd:a20::da
220	2001:db8:abcd:a20::db/128	2001:db8:abcd:a20::db
221	2001:db8:abcd:a20::dc/128	2001:db8:abcd:a20::dc
222	2001:db8:abcd:a20::dd/128	2001:db8:abcd:a20::dd
223	2001:db8:abcd:a20::de/128	2001:db8:abcd:a20::de
224	2001:db8:abcd:a20::df/128	2001:db8:abcd:a20::df
225	2001:db8:abcd:a20::e0/128	2001:db8:abcd:a20::e0
226	2001:db8:abcd:a20::e1/128	2001:db8:abcd:a20::e1
227	2001:db8:abcd:a20::e2/128	2001:db8:abcd:a20::e2
228	2001:db8:abcd:a20::e3/128	2001:db8:abcd:a20::e3
229	2001:db8:abcd:a20::e4/128	2001:db8:abcd:a20::e4
230	2001:db8:abcd:a20::e5/128	2001:db8:abcd:a20::e5
231	2001:db8:abcd:a20::e6/128	2001:db8:abcd:a20::e6
232	2001:db8:abcd:a20::e7/128	2001:db8:abcd:a20::e7
233	2001:db8:abcd:a20::e8/128	2001:db8:abcd:a20::e8
234	2001:db8:abcd:a20::e9/128	2001:db8:abcd:a20::e9
235	2001:db8:abcd:a20::ea/128	2001:db8:abcd:a20::ea
236	2001:db8:abcd:a20::eb/128	2001:db8:abcd:a20::eb
237	2001:db8:abcd:a20::ec/128	2001:db8:abcd:a20::ec
238	2001:db8:abcd:a20::ed/128	2001:db8:abcd:a20::ed
239	2001:db8:abcd:a20::ee/128	2001:db8:abcd:a20::ee
240	2001:db8:abcd:a20::ef/128	2001:db8:abcd:a20::ef
241	2001:db8:abcd:a20::f0/128	2001:db8:abcd:a20::f0
242	2001:db8:abcd:a20::f1/128	2001:db8:abcd:a20::f1
243	2001:db8:abcd:a20::f2/128	2001:db8:abcd:a20::f2
244	2001:db8:abcd:a20::f3/128	2001:db8:abcd:a20::f3
245	2001:db8:abcd:a20::f4/128	2001:db8:abcd:a20::f4
246	2001:db8:abcd:a20::f5/128	2001:db8:abcd:a20::f5
247	2001:db8:abcd:a20::f6/128	2001:db8:abcd:a20::f6
248	2001:db8:abcd:a20::f7/128	2001:db8:abcd:a20::f7
249	2001:db8:abcd:a20::f8/128	2001:db8:abcd:a20::f8
250	2001:db8:abcd:a20::f9/128	2001:db8:abcd:a20::f9
251	2001:db8:abcd:a20::fa/128	2001:db8:abcd:a20::fa
252	2001:db8:abcd:a20::fb/128	2001:db8:abcd:a20::fb
253	2001:db8:abcd:a20::fc/128	2001:db8:abcd:a20::fc
254	2001:db8:abcd:a20::fd/128	2001:db8:abcd:a20::fd
255	2001:db8:abcd:a20::fe/128	2001:db8:abcd:a20::fe
256	2001:db8:abcd:a20::ff/128	2001:db8:abcd:a20::ff

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 /60
/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	1
/64	2⁶⁴	1	16 split →
/72	2⁵⁶	-	4,096 split →
/80	2⁴⁸	-	1,048,576 split →
/96	4,294,967,296	-	2³⁶ split →
/112	65,536	-	2⁵² split →
/120	256	-	2⁶⁰ split →
/124	16	-	2⁶⁴ split →
/126	4	-	2⁶⁶ split →
/127	2	-	2⁶⁷ split →
/128	1	-	2⁶⁸ 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 →