TCP SYN (p0f)

4:55+9:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-14 14:04 · last seen 2026-09-05 21:39 · JSON

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 TTL55+9
Options length0
MSS1420
Window sizemss*46
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
t13d190900_9dc949149365_97f8aa674fd95
t13d1516h1_8daaf6152771_d8a2da3f94cd3
t13d1712h1_ab0a1bf427ad_882d495ac3813
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_209bf58f7e8c_000000000000_0000000000005
ge11nn06enus_fb4afd1f380a_000000000000_0000000000002
ge11nr11engb_0eef5b324015_000000000000_0000000000001
ge11nr14enus_4a2844af1d7f_000000000000_0000000000001
ge11nr14engb_4a2844af1d7f_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
ge11nn030000_341eb0d8946c_000000000000_0000000000001
ge11nr030000_341eb0d8946c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65320_2-4-8-1-3_1420_105

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.02
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 (Linux; U; Android 6.0; he-il; Redmi Note 4X Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.141 Mobile Safari/537.36 XiaoMi/MiuiBrowser/10.9.7-g1
Mozilla/5.0 (Linux; Android 9; Nokia 7.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Mobile Safari/537.361
SearchExpress1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.87 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.361
crusader-worker/1.01

Country

fingerprintco-occurrences
US · United States8
GB · United Kingdom5

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC13