TCP SYN (p0f)

4:47+17:0:1380:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:44 · last seen 2026-09-14 05:35 · 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
MSS1380
Window sizemss*44
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
t13d4312h1_c7886603b240_b26ce05bbdd63
t13d4412h1_fd39b124ee10_58ed7828516f2
t13i170900_5b57614c22b0_78e6aca7449b2
t13d1515h1_8daaf6152771_0a20fe35d3a51

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06ja00_fb4afd1f380a_000000000000_0000000000002
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.2
he11nn06ja00_fb4afd1f380a_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001
ge11nn070000_f395b2c4bb38_000000000000_0000000000001
ge11nn050000_e81ae831f766_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1380_78

User-Agent

fingerprintco-occurrences
libredtail-http2
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 16_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) FxiOS/118.1 Mobile/15E148 Safari/605.1.151
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.361
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.361

Country

fingerprintco-occurrences
JP · Japan3
AR · Argentina2
PK · Pakistan2
BR · Brazil1

Network (ASN)

fingerprintco-occurrences
AS2516 · KDDI CORPORATION3
AS11664 · Techtel LMDS Comunicaciones Interactivas S.A.2
AS45773 · PERN AS Content Servie Provider, Islamabad, Pakistan2
AS268335 · ORACLON TELECOM1