TCP SYN (p0f)

4:116+12:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-01 14:40 · last seen 2026-09-11 10:14 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 2/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 TTL116+12
Options length0
MSS1460
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d1812h1_85036bcba153_b26ce05bbdd658
t13d141100_cbb2034c60b8_e5728521abd45
t12d4907h1_730fb1b0ac6a_8587f467d9ea3
t12d210700_76e208dd3e22_f28add8e7af02
t13d1813h1_85036bcba153_d339722ba4af1
t13d191000_9dc949149365_e7c2852226511
t13d3112h1_e8f1e7e78f70_8d633dac71241

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.38
ge11nr07enus_313799b1302d_000000000000_00000000000010
ge11nr200000_44e005936497_000000000000_0000000000005
ge11nr07zhcn_313799b1302d_000000000000_0000000000005
ge11nr07engb_313799b1302d_000000000000_0000000000003
ge11nr08enus_f7c64dd4d2b3_000000000000_0000000000003
ge11nn050000_f42f60d0fe7d_000000000000_0000000000001
po11nn070000_c3be8024b1dd_000000000000_0000000000001
ge11nr030000_cd680697de12_000000000000_0000000000001
ge11nn010000_4a823118b9ba_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_871

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.1514
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.012
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.19
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.368
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.368
python-requests/2.34.26
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.363
Go-http-client/1.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.01

Country

fingerprintco-occurrences
DE · Germany62
FR · France3
US · United States2
IN · India2
HK · Hong Kong SAR China1
TZ · Tanzania1

Network (ASN)

fingerprintco-occurrences
AS209946 · ALINDA LLC57
AS197170 · TechTies Inc.5
AS51167 · Contabo GmbH3
AS140641 · YOTTA NETWORK SERVICES PRIVATE LIMITED2
AS45753 · Netsec Limited1
AS8560 · IONOS SE1
AS214783 · Danny Nieuwenhuis trading as DedicatedNodes1
AS33765 · TANZANIA TELECOMMUNICATIONS CO. LTD1