TCP SYN (p0f)

4:113+15:0:1380:mss*47,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-08-20 10:20 · last seen 2026-08-29 13:16 · 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 TTL113+15
Options length0
MSS1380
Window sizemss*47
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
t13d2913h1_723694b0fccc_5671b5df50293
t13d1712h1_ab0a1bf427ad_882d495ac3811

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn11frfr_835281d8e5d9_000000000000_0000000000001
ge11nr11frfr_b350a6a7c155_000000000000_0000000000001
ge11nr11frfr_835281d8e5d9_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

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-1-3-1-1-4_1380_84

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.1 Mobile/15E148 Safari/604.13
Mozilla/5.01

Country

fingerprintco-occurrences
FR · France3
AR · Argentina1

Network (ASN)

fingerprintco-occurrences
AS12322 · Free SAS3
AS263812 · SONDATECH S.A.S.1