
What exactly are the specifications for a valid mac address?
May 19, 2017 · Unicast MAC addresses must never set the 1's place bit in the first byte. That's the "group" (multicast/broadcast) bit. That's what you ran afoul of with 0x33. If you make up your own …
Windows 10 network adapter MAC address change - Super User
Mar 25, 2024 · Trying to replace original MAC address of my network adapter with a custom one, but it behaves strangely: Changed MAC address (tried many custom ones, such as 0123456789AB) within …
Why does Windows 11 display a different ethernet MAC (hardware) …
Oct 15, 2024 · Why does Windows 11 display a different ethernet MAC (hardware) address than Linux? Ask Question Asked 1 year, 2 months ago Modified 1 year, 2 months ago
How do I find the MAC address of my Synology NAS?
Dec 20, 2024 · I could not find the MAC address for my Synology NAS; how do I find it? I searched for this in the control panel network and network bond.
What can cause a MAC Address to change? - Super User
Mac address can change when installing a new ethernet card.Also when switching internet providers can change a mac address. Sometimes a mac address changes when install some software and/or …
36 chars MAC addresses on Windows Server 2012 DHCP server
May 18, 2020 · When I connect devices on my network, the DHCP server running on a Windows Server 2012 sometimes reports their MAC address correctly (12 characters), but sometimes it reports their …
Why can't I change the MAC address? - Super User
Oct 10, 2024 · It's a multicast/broadcast address, not a unicast address. It has the 1's-place bit of the first octet (8-bit byte) set. That bit is the broadcast/multicast bit. You can't use that as the MAC …
How to find the factory default MAC address? - Super User
Feb 8, 2025 · A few weeks ago, changed the MAC address for the network adapter in the registry on a Windows 11 host. After realizing the security risks, I tried changing it back, but it failed. I need help …
Excel VBA MAC address format & extract to columns as text 00 …
Oct 27, 2020 · Excel VBA MAC address format & extract to columns as text 00 changes to 0 or 01 changes to 1 Ask Question Asked 5 years, 1 month ago Modified 5 years, 1 month ago
networking - "Private" MAC Address - Super User
Apr 30, 2015 · The MAC Address lookup of the router uses OUI Lookup - it's what designated/defined it as a "Private" mac address. Next it has an assigned IP address on my network and NMAP cannot …