Frequently asked questions

How to recognise a Cisco's MAC address application?

Summary

Range or Prefix	Application	Notes

01:00:0C:00:00:00	Inter Switch Link (ISL)
01:00:0C:CC:CC:CC	CDP (Cisco Discovery Protocol), VTP (VLAN Trunking Protocol)	EtherType is 0x0802
01:00:0C:CC:CC:CC	Port Aggregation Protocol (PAgP)	SNAP HDLC Protocol Type is 0x0104
01:00:0C:CC:CC:CC	Unidirectional Link Detection (UDLD)	SNAP HDLC Protocol Type is 0x0111
01:00:0C:CC:CC:CC	Dynamic Trunking (DTP)	SNAP HDLC Protocol Type is 0x2004
01:00:0C:CC:CC:CC	VLAN Trunking (VTP)	SNAP HDLC Protocol Type is 0x2003
01:00:0C:CC:CC:CD	Cisco Shared Spanning Tree Protocol address	EtherType is 0x0802
01:00:0C:CC:CC:CD	Spanning Tree PVSTP+	SNAP HDLC Protocol Type is 0x010B
01:00:0C:CD:CD:CD	STP Uplink Fast	SNAP HDLC Protocol Type is 0x200A
01:00:0C:CD:CD:CE	VLAN Bridge	SNAP HDLC Protocol Type is 0x010C
01:00:0C:DD:DD:DD	CGMP (Cisco Group Management Protocol)

References

Trusted by the following companies

and many more...

Download an exhaustive MAC Address Vendor Database for your educational, business or enterprise needs.

Our database comes in the following forms: JSON, CSV, XML, Cisco vendorMacs.xml for maximum compatibility and fast integration into existing systems. The API version is also available.

Order database API pricing