TCP SYN (p0f)

6:45+19:0:1320:65535,12:mss,nop,ws,sok,ts::0

first seen 2026-08-31 15:03 · last seen 2026-08-31 15:12 · JSON

Decomposed attributes

IP version6
Initial TTL45+19
Options length0
MSS1320
Window size65535
Window scale12
Options layoutmss,nop,ws,sok,ts
Payload class0

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d1617h2_86a278354501_3e9721a6796e6

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12engb_a72b71f519fc_000000000000_0000000000005
ge20nr11engb_187a9385d229_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +32 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-4-8_1320_126

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.06

Country

fingerprintco-occurrences
GB · United Kingdom6

Network (ASN)

fingerprintco-occurrences
AS206067 · Hutchison 3G UK Limited6