TCP SYN (p0f)

4:112+16:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-28 13:09 · last seen 2026-10-31 16:04 · 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 TTL112+16
Options length0
MSS1440
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
t13d2212h2_231e334592e8_36bf25f296df Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.17
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr030000_cd680697de12_000000000000_0000000000002
ge20nn040000_272467e735d1_000000000000_0000000000002
ge20nn040000_b293ea6c67e2_000000000000_0000000000002
ge20nn040000_200b94e8daef_000000000000_0000000000002
ge20nn040000_44339f58b125_000000000000_0000000000002
ge20nn050000_0405741b5fea_000000000000_0000000000001
ge20nn040000_4fc62b8ba0b7_000000000000_0000000000001
ge20nn040000_dc4a0ccf6385_000000000000_0000000000001
ge20nn040000_64de499ecc04_000000000000_0000000000001
ge20nn040000_ac162d8a7b0c_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:65535|67043329|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.17

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_818

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.3617
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States19

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation19

TLS supported groups

fingerprintco-occurrences
0018,0017 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.7, powershell 5.1.26100.33648, curl 8.21.0.The fingerprint page shows the full measured match list. More on the catalog.2