A1 B2 C3 D4

tcpdump (libpcap) capture file

category: file-signature
normalized: a1b2c3d4
confirmed: 2026-03-15
lookups: 1
source: https://www.garykessler.net/

tcpdump (libpcap) capture file. Kessler type: Network.

Similar magic numbers

value	name	category
A1 B2 CD 34	Extended tcpdump (libpcap) capture file	file-signature