There is a bit which gets set in the OUI portion of a MAC address to signify a randomized vs. locally administered address.
The quick synopsis is look at the second character in a MAC address, if it is a 2, 6, A, or E it is a randomized address.
Wi-Fi Address 92:B1:B8:42:D1:85 is a randomized address, because the second character is a 2.
The MAC Addresses are 48-bit in length, 24-bit for the OUI, and 24-bit for the Network Interface Controller.
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Pay attention to this part:
It determines your Operating System
Hyphen-Hexadecimal notation = MM-MM-MM-SS-SS-SS
Colon-Hexadecimal notation = MM:MM:MM:SS:SS:SS
Period-separated Hexadecimal notation = MMM.MMM.SSS.SSS
Windows uses Hyphen-Hexadecimal notation = MM-MM-MM-SS-SS-SS |||
For example: 00-14-22-04-25-37
MacOS uses Hyphen-Hexadecimal notation = MM-MM-MM-SS-SS-SS ||| For example: 00-14-22-04-25-37
Linux OS uses Colon-Hexadecimal notation
Cisco Systems uses Period-separated Hexadecimal notation.
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REMEMBER YOU DON'T WANT 2, 6, A or E as it signifies a randomized address.
REMEMBER YOU WANT A GLOBALLY UNIQUE MAC ADDRESS NOT A RANDOM LOCALLY ADMINISTERED ONE
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Browse the Browse MAC Address Database:
https--------www-----macvendorlookup-----com/browse
This tool will display the name of the company that manufactured a specific network device based on its MAC Address.
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MAC Address Lookup:
https://-----------api[dot]viewdns[dot]info/maclookup/
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What is an OUI MAC Address?
It's the part of the MAC Address that defines the hardware manufacturer.
It's the leftmost six digits (24 bits), also called prefixes, and is associated with the hardware manufacturer.
The OUI of some well-known manufacturers are as follow:
Dell: 00-14-22
Nortel: 00-04-DC
Cisco: 00-40-96
Belkin: 00-30-BD
Huawei: 00-9A-CD
Hewlett Packard: 3C-D9-2B
Google, Inc: 3C-5A-B4
Linksys (Cisco Systems): 00-13-10
Linksys (Cisco Systems): 00-25-9C
Linksys (Cisco Systems): 68-7F-74
-----You want your system to match-----not be random
Universal/Local and Individual/Group bits in MAC addresses
Universally administered Locally administered
x0‑xx‑xx‑xx‑xx‑xx x2‑xx‑xx‑xx‑xx‑xx
x4‑xx‑xx‑xx‑xx‑xx x6‑xx‑xx‑xx‑xx‑xx
x8‑xx‑xx‑xx‑xx‑xx xA‑xx‑xx‑xx‑xx‑xx
xC‑xx‑xx‑xx‑xx‑xx xE‑xx‑xx‑xx‑xx‑xx
Multicast (group) Locally administered
x1‑xx‑xx‑xx‑xx‑xx x3‑xx‑xx‑xx‑xx‑xx
x5‑xx‑xx‑xx‑xx‑xx x7‑xx‑xx‑xx‑xx‑xx
x9‑xx‑xx‑xx‑xx‑xx xB‑xx‑xx‑xx‑xx‑xx
xD‑xx‑xx‑xx‑xx‑xx xF‑xx‑xx‑xx‑xx‑xx
MAC Addresses
49:04:88:07:52:28
b1:5b:e8:6b:d0:da
6d:f2:00:ee:6d:c1
9e:9f:ac:26:cc:e5
2f:16:f8:7f:81:3c
d7:45:21:d3:59:1a
36:7e:be:32:05:8f
a3:61:9b:7f:ca:35
f2:f4:6a:31:64:97
30:1f:3e:a5:ab:b6
92:f6:e2:f5:e7:ba
82:33:9e:41:cc:4a
d2:b5:6a:bf:3c:6b
16:f9:78:b5:92:21
8a:e1:46:d5:4c:5c
9b:7f:dd:4e:65:07
c4:9b:7e:97:02:c3
29:3a:b8:aa:31:0c
47:d9:61:12:45:d6
a0:a7:31:cb:50:f1
7a:46:1d:1e:c6:06
b3:b1:78:2a:10:a7
cc:7a:87:cc:1b:10
e6:69:46:de:de:b9
95:57:26:fe:73:d4
be:26:dd:ae:b2:98
41:b5:7b:be:86:a1
f3:b6:8a:4e:52:bb
63:3c:de:4c:aa:f1
6d:9f:97:58:8c:2b
88:0a:e7:ee:3e:7b
9d:45:09:f2:97:1b
37:39:59:b6:23:6d
4a:e0:b6:60:ff:50
65:a5:9d:0b:3e:74
b2:db:96:83:2f:6b
2c:aa:1a:c3:d7:2f
ec:2a:64:8e:b9:18
68:0b:90:62:83:65
fa:11:ab:2d:c0:57
d2:a7:ec:88:11:02
9b:15:da:e3:4a:a4
01:b3:ff:bb:ba:1c
74:b7:f9:90:19:66
bb:ac:2e:2c:77:5a
f0:33:53:59:70:5b
1a:fb:7d:15:68:74
58:cc:01:29:bc:34
c7:5a:28:fb:62:e2
b2:be:6a:5d:e9:01
d6:30:66:44:41:6a
33:45:22:f0:33:cf
d8:e8:e1:fa:85:42
e9:47:42:de:c8:c0
d6:c2:91:6c:61:f3
28:61:08:3f:44:4d
c6:80:05:17:82:88
05:ef:28:2e:f1:b4
35:44:75:24:28:f2
61:6a:33:31:99:a1
b2:95:a2:33:0a:1e
32:98:17:25:a7:c1
e2:bb:f0:dc:cd:48
3c:7e:92:af:87:87
40:59:70:37:38:ad
b7:3a:6b:a4:87:2a
97:ca:3e:84:5b:9d
48:36:0f:38:07:2e
fe:4a:20:43:87:df
f7:f5:0f:b7:4a:f8
49:ef:4a:6b:6a:34
93:d4:9f:52:29:f2
6f:d6:ff:35:74:66
93:fd:0f:08:89:f0
88:53:bc:00:43:04
31:10:e3:ff:9f:a0
5f:a8:41:fe:b2:6f
1f:3f:ed:0f:d3:6e
09:c6:b3:5a:51:67
9f:61:e5:0a:a0:bf
de:e3:19:cd:cf:bc
f1:60:50:ed:5a:85
36:0d:e8:b1:c5:7d
f1:18:49:a5:ac:0e
1d:db:ea:06:ad:43
18:38:2e:a1:a2:9a
c4:f0:2e:a3:9c:f9
00:21:71:61:f6:44
10:bc:2b:b1:41:fd
e7:6b:b0:fc:40:2d
cb:4a:36:8f:68:fd
b4:b7:58:cf:e3:bb
ad:5a:54:8f:1c:b4
49:bc:f9:bf:db:f1
7f:0d:e3:bc:c6:81
df:a8:a9:d5:93:dc
59:39:b8:7c:91:32
f8:5c:d1:a2:54:d4
0a:b0:b2:ae:0f:a6
8b:83:ab:77:d9:be
00:ff:84:f1:5c:e3
bc:1a:88:cb:a9:7d
a4:92:3b:01:08:fb
f8:3b:b2:7b:13:3a
ce:ae:2c:a9:9f:cd
fd:c6:fc:b3:52:89
96:c6:d0:fe:a9:5f
03:91:48:37:bc:ef
85:fe:df:50:52:ff
e6:b4:a8:a5:07:fe
93:56:47:95:c5:3f
2c:7c:85:4d:10:43
86:1f:bd:b5:ca:27
83:2e:b6:54:ae:8c
c7:8e:0f:63:2c:b8
b4:3b:99:32:2b:82
af:65:4a:a4:35:15
7b:d3:40:4b:bf:5b
36:86:4b:06:1c:07
2b:3d:ae:62:c0:02
b4:6d:6e:07:26:de
45:b7:2c:3e:47:e7
70:5b:4c:e6:ec:47
49:c4:ee:17:75:ca
9f:d1:1b:6c:36:7f
59:be:e1:b9:8f:bc
8a:69:5f:6b:3b:6b
11:ef:44:00:94:2e
7b:61:25:8c:9a:b3
0c:e2:b3:4c:6c:53
66:f1:6a:e6:3e:63
28:77:1f:46:51:55
1b:cd:9e:78:5a:0a
51:ac:11:11:e8:8e
fe:75:b3:c8:bd:6c
1f:51:40:d8:5e:ec
91:52:2f:d9:3f:67
58:9a:ba:ea:01:fe
d9:a8:d8:40:28:36
40:2a:51:f9:9d:9d
a0:78:07:c7:1e:3c
9a:1f:ad:05:f7:08
44:d3:f0:2d:8d:78
01:0a:52:49:8e:b7
19:77:f7:90:94:d0
e2:86:73:ea:bd:3e
a5:94:83:13:19:96
54:3d:94:73:6e:c6
db:d2:97:4d:5e:84
48:eb:61:1e:3c:db
1b:67:18:8e:28:9a
03:bd:2f:02:6a:c1
7e:1a:c0:da:e1:7f
7f:4d:ed:18:2e:0b
42:43:68:81:11:a0
d1:42:bc:f3:76:ea
bc:de:87:96:7c:a6
ab:2b:6d:21:c5:5d
26:31:db:4b:e5:b8
84:bd:03:d5:f5:03
4a:c3:ba:26:66:0f
fa:23:9d:44:fa:34
fc:b1:22:2b:e0:ac
11:b5:8f:83:95:72
08:55:de:2a:18:e6
48:7b:7f:dc:3f:f4
e1:da:f2:32:02:96
a2:4d:df:c9:63:cf
64:32:21:79:5f:ed
59:e1:03:c1:ea:6b
c6:36:cf:73:09:a4
13:00:33:fc:51:5b
28:64:96:cb:01:86
ec:ed:1e:ff:92:71
36:09:3c:b7:b2:db
da:10:9e:87:60:71
6c:b3:e3:31:65:24
4d:8e:7b:82:38:a3
08:f7:a2:b1:e8:b6
3d:8d:d4:99:86:ef
dc:14:49:c9:ca:86
fd:4b:54:74:40:14
6e:2e:61:48:7c:39
27:d0:11:e8:7a:9e
20:c3:2f:6d:06:3f
2b:ed:15:b1:94:8e
6f:b5:e6:f3:01:96
a1:7c:51:fb:eb:e0
c7:aa:20:fe:4a:e3
a4:3b:7d:5e:fb:05
ff:52:fd:0c:d0:76
a6:8c:89:c2:fe:40
20:30:53:99:28:4d
38:85:29:d9:0b:6c
2d:58:57:42:ba:ec
bb:29:8d:4e:89:89
44:cd:05:fc:59:14
e7:95:bb:36:db:bb
7e:59:c2:06:dc:29
e6:21:90:ff:cb:07
63:02:34:96:a5:9a
35:b4:ea:ae:03:ea
ed:0e:b5:81:42:05
70:bb:a0:66:24:eb
42:30:3e:88:81:19
b7:93:23:24:81:7e
af:4b:59:87:2f:ad
69:c2:7a:7b:6f:36
53:49:ec:1c:fa:76
d9:af:28:94:42:d9
b0:d2:a5:89:87:42
ca:6f:a5:c4:e5:26
11:b8:83:e9:dc:89
5a:c2:ad:05:32:df
c8:15:4a:4d:1f:5f
c1:70:bc:e4:63:d4
b0:cb:b5:fe:13:f8
be:a1:40:28:07:fa
26:1d:35:be:a4:7e
72:a5:6d:84:90:1a
ef:1a:74:64:9f:05
15:3f:f4:17:9e:d4
3d:46:57:83:da:b5
03:b2:69:53:ef:ae
5d:ec:ba:f3:40:b1
bd:64:5f:51:84:ac
e8:4a:02:88:69:46
a5:15:87:99:91:81
f5:b4:25:6d:66:ad
d2:e3:78:49:28:e2
a6:c7:f1:f5:ac:95
8c:e7:49:bb:68:cc
d5:4e:67:4d:1a:e2
96:d4:23:14:99:55
91:77:5d:54:ce:3e
cc:94:d2:b3:55:d5
20:bd:d5:8b:1a:f3
05:64:48:7e:37:61
13:31:7d:6a:c9:2c
53:60:49:c3:d5:9e
1f:05:5b:51:e8:fb