TCP SYN (p0f)

4:47+17:0:1400:65535,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-19 17:11 · last seen 2026-09-07 23:04 · JSON

Distinct clients per day (last 30 days, peak 4/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
MSS1400
Window size65535
Window scale10
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
t13d4412h1_fd39b124ee10_58ed7828516f11
t13d1515h1_8daaf6152771_de4a06bb82e37
t13d1515h1_8daaf6152771_0a20fe35d3a54
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
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.11
ge11nn13enus_9db22d02e17a_000000000000_00000000000010
ge11nn14enus_4a2973d235de_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1400_1023

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/84.0.4147.125 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.99 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.361
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 ADG/11.0.2510 AOLBUILD/11.0.2510 Safari/537.361
Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.92 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.3 Safari/537.361

Country

fingerprintco-occurrences
ZA · South Africa5
NG · Nigeria5
KE · Kenya4
KW · Kuwait2
ET · Ethiopia2
MU · Mauritius1
PK · Pakistan1
BH · Bahrain1
BD · Bangladesh1
BG · Bulgaria1

Network (ASN)

fingerprintco-occurrences
AS12091 · MTN SA5
AS36873 · Airtel Networks Limited5
AS33771 · Safaricom Limited3
AS24757 · Ethio Telecom2
AS29357 · NATIONAL MOBILE TELECOMMUNICATIONS COMPANY K.S.C.P.2
AS23889 · Mauritius Telecom Ltd1
AS15399 · Wananchi Group (Kenya) Limited1
AS59257 · CMPak Limited1
AS51375 · STC BAHRAIN B.S.C CLOSED1
AS45588 · Bangladesh Telecommunications Company Limited (BTCL), Nationwide PSTN Operator and Data and Internet Service Provider.1