TCP SYN (p0f)

4:114+14:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-11 01:59 · last seen 2026-10-29 11:10 · JSON

Last 7 days (1 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 TTL114+14
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
t12d860600_e18388e7f3a3_a1e9356827959
t13d4312h1_c7886603b240_b26ce05bbdd64
t13d221000_231e334592e8_29829a46703f3
t13d1712h1_ab0a1bf427ad_882d495ac3812
t13i131000_f57a46bbacb6_ab7e3b40a6771
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.1
t13d1812h1_85036bcba153_b26ce05bbdd61
t12d4907h1_730fb1b0ac6a_8587f467d9ea1
t12d210700_76e208dd3e22_f28add8e7af01
t13d221100_231e334592e8_36bf25f296df1

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.5
ge11nn05enus_a1be516b8e6e_000000000000_0000000000004
ge11nn15enus_35372a7bda31_000000000000_0000000000003
ge10nr030000_341eb0d8946c_000000000000_0000000000002
ge11nn06enus_fb4afd1f380a_000000000000_0000000000002
ge11nn06enus_ff6fe191b79d_000000000000_0000000000002
ge11nn030000_0db47b7d240d_000000000000_0000000000001
ge11nn020000_3ed38b250d3d_000000000000_0000000000001
ge11nn020000_fdb5000be5f4_000000000000_0000000000001
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1
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.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_816

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.366
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.362
Mozilla/5.01
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
python-requests/2.32.51
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64)1

Country

fingerprintco-occurrences
NL · Netherlands9
US · United States6
DE · Germany4
RO · Romania2
MY · Malaysia2
JP · Japan1
SG · Singapore1
GB · United Kingdom1
TH · Thailand1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS210558 · 1337 Services GmbH6
AS20001 · Charter Communications Inc4
AS197170 · TechTies Inc.2
AS204428 · SS-Net2
AS49581 · Ferdinand Zink trading as Tube-Hosting2
AS206216 · Advin Services LLC2
AS14061 · DigitalOcean, LLC1
AS48090 · TECHOFF SRV LIMITED1
AS7979 · Servers.com, Inc.1
AS25369 · Hydra Communications Ltd1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.4
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1, python-requests 2.34.2, curl 8.23.0, +4 more.The fingerprint page shows the full measured match list. More on the catalog.2
6399,001d,0017,0018,00191