TCP SYN (p0f)

6:48+16:0:1420:mss*46,7:mss,sok,ts,nop,ws:flow:0

first seen 2026-10-30 13:38 · last seen 2026-10-30 13:38 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version6
Initial TTL48+16
Options length0
MSS1420
Window sizemss*46
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t13d1517h2_8daaf6152771_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 155.0.1, firefox 154.0, firefox 156.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog.7

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn12enus_7e62679e718a_000000000000_0000000000005
ge20nr11enus_1d88e8a431b9_000000000000_0000000000002

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.2
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, +31 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:131072;5:16384|12517377|17:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|19:0:0:42|m,p,a,s1
1:65536;2:0;4:131072;5:16384|12517377|21:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
65320_2-4-8-1-3_1420_77

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:154.0) Gecko/20100101 Firefox/154.07

Country

fingerprintco-occurrences
FR · France7

Network (ASN)

fingerprintco-occurrences
AS12322 · Free SAS7

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01017