TCP SYN (p0f)

4:114+14:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-25 16:44 · last seen 2026-10-30 10:03 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 7/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 TTL114+14
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.128
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
t13d131100_f57a46bbacb6_e5728521abd41
t13d1812h1_85036bcba153_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn040000_200b94e8daef_000000000000_0000000000009
ge20nn040000_a610c1346bea_000000000000_0000000000009
ge20nn040000_272467e735d1_000000000000_0000000000008
ge20nn040000_bd70857818a4_000000000000_0000000000008
ge20nn040000_421e6bfdbec2_000000000000_0000000000008
ge20nn040000_bdf2d84aab57_000000000000_0000000000008
ge20nn040000_9d24d42de290_000000000000_0000000000008
ge20nn040000_89d3fd0d6813_000000000000_0000000000007
ge20nn040000_14e57ecc58b7_000000000000_0000000000007
ge20nn040000_31537f9be9e0_000000000000_0000000000006

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.128

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_8131

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/537.36128
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:125.0) Gecko/20100101 Firefox/125.01
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
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States132

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation132

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.20
001d,0017,001e,0019,00181