TCP SYN (JA4T)

62587_2-4-8-1-3_1460_7

first seen 2026-07-01 16:08 · last seen 2026-08-27 03:14 · 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

TCP window62587
Option kinds2-4-8-1-3
MSS1460
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
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1812h1_85036bcba153_d41ae481755e1
t13d1114h2_5e2a75874763_89e9e4bb34191
t13d1812h1_85036bcba153_b26ce05bbdd61

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn030000_ff50983941c1_000000000000_0000000000001
he11nn09*000_873be43fca5d_000000000000_0000000000001
ge11nn14enus_86da88119449_000000000000_0000000000001
ge11nn09*000_873be43fca5d_000000000000_0000000000001
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:16777216|16711681|0|m,p,a,s1

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:62587,7:mss,sok,ts,nop,ws:df,id+:02
4:56+8:0:1460:62587,7:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1460:62587,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
node2
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.361
python-requests/2.34.21
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.1 Safari/605.1.151

Country

fingerprintco-occurrences
US · United States5

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.5