TCP SYN (p0f)

4:47+17:0:1410:mss*46,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:45 · last seen 2026-09-15 16:30 · JSON

Last 7 days (2 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
MSS1410
Window sizemss*46
Window scale7
Options layoutmss,sok,ts,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
t13d361000_bcee18a5b459_3550537cd59b4
t13d361000_bcee18a5b459_c3976d2688532
t13d1011h2_61a7ad8aa9b6_f9531d972513 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-hyper 1.11.0, rust-hyper 1.11.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog.2
t12d7008h1_0b90a0e79fbd_046e095b7c4a1
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_c382d64c24c4_000000000000_0000000000006
ge11nr030000_0d34275228c4_000000000000_0000000000001
ge11nn05trtr_0b66f42d61ad_000000000000_0000000000001
ge20nn04*000_ded3c6d8f0eb_000000000000_0000000000001
ge20nn04frfr_3b20e5b1deac_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;5:16384;6:16384|5177345|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.13.4, rust-reqwest 0.12.28, rust-reqwest 0.13.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1410_710

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2)6
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.361
Mozilla/5.0 (compatible; GoFastSiteChecker/1.0)1
Mozilla/5.0 (compatible; Qwantbot/1.0; +https://help.qwant.com/bot/)1
Mozilla/5.0 (compatible; Qwantbot/1.0_3000152; +https://help.qwant.com/bot/)1

Country

fingerprintco-occurrences
SE · Sweden6
FR · France2
NL · Netherlands1
TR · Turkey1

Network (ASN)

fingerprintco-occurrences
AS42708 · Glesys AB6
AS199064 · QWANT SAS2
AS50266 · Odido Netherlands B.V.1
AS9121 · Turk Telekomunikasyon Anonim Sirketi1