TCP SYN (p0f)

4:111+17:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-27 14:01 · last seen 2026-10-22 17:48 · JSON

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 TTL111+17
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 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.10

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn040000_50ac80afc84f_000000000000_0000000000002
ge20nn050000_31926751f3ec_000000000000_0000000000001
ge20nn040000_4fc62b8ba0b7_000000000000_0000000000001
ge20nn040000_31537f9be9e0_000000000000_0000000000001
ge20nn040000_53ef267af07a_000000000000_0000000000001
ge20nn040000_200b94e8daef_000000000000_0000000000001
ge20nn040000_ac162d8a7b0c_000000000000_0000000000001
ge20nn040000_2b87c4285863_000000000000_0000000000001
ge20nn040000_d17ad29eed9e_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 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.10

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_89

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/537.3610

Country

fingerprintco-occurrences
US · United States10

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation10

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