TCP SYN (p0f)

4:110+18:0:1260:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-10-01 09:09 · last seen 2026-10-11 20:51 · JSON

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 version4
Initial TTL110+18
Options length0
MSS1260
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+
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
t13d1010h2_561a47a994ce_4c1ab05529048

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn10enus_d353d425b0bb_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 152.0.1.The fingerprint page shows the full measured match list. More on the catalog.3
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +27 more.The fingerprint page shows the full measured match list. More on the catalog.3
ge20nr11enus_3901d4197baf_000000000000_0000000000001
ge20nn09enus_bfc092dff6c6_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|3:0:0:42|m,p,a,s3
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|3:0:0:22|m,p,a,s2
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|5:0:0:22|m,p,a,s1
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|7:0:0:22|m,p,a,s1
1:4096;2:0;3:100;4:131072;5:16384;6:65535|2147418112|11:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1260_88

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:157.0) Gecko/20100101 Firefox/157.07
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:156.0) Gecko/20100101 Firefox/156.01

Country

fingerprintco-occurrences
BG · Bulgaria8

Network (ASN)

fingerprintco-occurrences
AS49882 · Paysafe Holdings UK Limited8