TCP SYN (JA4T)

62727_2-4-8-1-3_8365_7

first seen 2026-07-23 23:57 · last seen 2026-11-01 02:39 · JSON

Last 7 days (1051 observations)

Distinct clients per day (last 30 days, peak 262/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

TCP window62727
Option kinds2-4-8-1-3
MSS8365
Window scale7

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
t13d9912h1_ee3966d44962_c50a3655fff111916

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_6dac75bd47eb_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.11916

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:2097152;5:131072;6:524288|5177345|0|m,s,a,p11916

TCP SYN (p0f)

fingerprintco-occurrences
4:111+17:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:07595
4:112+16:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:03736
4:109+19:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:0447
4:108+20:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:089
4:110+18:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:032
4:113+15:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:011
4:115+13:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:05
4:106+22:0:8365:62727,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Safari/605.1.15 (Applebot/0.1; +http://www.apple.com/go/applebot)11916

Country

fingerprintco-occurrences
US · United States11916

Network (ASN)

fingerprintco-occurrences
AS714 · Apple Inc.11916

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2614