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I was using AMD's magic packet utility to build a list of computers to do wake-on-lan and it found these entries:	01-00-5e-00-00-16 *NameNotFound*	01-00-5e-00-00-fc *NameNotFound*	01-00-5e-7f-ff-fa

First of all, I'm not sure why it would find these. They're not in the subnet I provided. I've never heard of them before; if they're reserved or not.

Feel free to offer a more descriptive title to this question and delete this comment. I'm not sure how to describe what I'm seeing, google only makes fun of me when I ask it this.

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up vote 10 down vote accepted

All perfectly normal to see in a modern network. They are all IPv4 multicast addresses. Here's a brief breakdown and you can read up in depth on your own: - IGMP - - LLMNR - - SSDP -

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Those are multicast addresses. Multicast addresses are used when a single packet is intended to be sent to multiple recipients. Refer to for a list of service what each address typically corresponds to.

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all look like multicast packets to me;

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