TCP SYN (p0f)

4:47+17:0:1460:mss*44,7:mss,nop,nop,sok,nop,ws:df,id+:0

first seen 2026-06-20 03:20 · last seen 2026-09-12 21:56 · JSON

Last 7 days (1 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 version4
Initial TTL47+17
Options length0
MSS1460
Window sizemss*44
Window scale7
Options layoutmss,nop,nop,sok,nop,ws
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
t13d3112h1_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.0.2, php-guzzle 7.14.2, +6 more.The fingerprint page shows the full measured match list. More on the catalog.19
t13d191100_9dc949149365_be53661681a48
t13d3113h1_e8f1e7e78f70_ce5650b735ce Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.0.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.19
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.2.0, php-guzzle 8.0.2, +7 more.The fingerprint page shows the full measured match list. More on the catalog.7
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge11nn040000_e1d2031bdfea_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-1-4-1-3_1460_727

User-Agent

fingerprintco-occurrences
curl/8.5.019
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.134 Safari/537.368
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)1

Country

fingerprintco-occurrences
US · United States19
DE · Germany9

Network (ASN)

fingerprintco-occurrences
AS11351 · Charter Communications Inc19
AS12816 · Leibniz-Rechenzentrum8
AS24940 · Hetzner Online GmbH1