TCP SYN (p0f)

4:113+15:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-11 01:52 · last seen 2026-10-26 07:51 · JSON

Last 7 days (1 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 TTL113+15
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
t13d311000_e8f1e7e78f70_518fb456ca5914
t12d860600_e18388e7f3a3_a1e9356827954
t13d191000_9dc949149365_e7c2852226514
t13d1312h2_f57a46bbacb6_e5728521abd43
t13d251100_b78ed14e2fd0_ab7e3b40a6773
t12d210700_76e208dd3e22_f28add8e7af03
t13d1712h1_ab0a1bf427ad_882d495ac3813
t12d4907h1_730fb1b0ac6a_8587f467d9ea2
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d1812h1_85036bcba153_d41ae481755e1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr12enus_25d14dfbfd78_000000000000_0000000000005
ge11nr09enus_a1ca5f23d14f_000000000000_0000000000004
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.4
ge11nn010000_4a823118b9ba_000000000000_0000000000004
ge20nr030000_0db47b7d240d_000000000000_0000000000003
ge11nr10enus_4cb5ac3f98a2_000000000000_0000000000003
ge11nr050000_57c5e92682a8_000000000000_0000000000003
ge11nn06enus_ff6fe191b79d_000000000000_0000000000003
ge11nr07enus_95ab0b2cda8a_000000000000_0000000000002
ge11nn15enus_35372a7bda31_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.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_820

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/537.363
Mozilla/5.03
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.362
Mozlila/5.0 (Linux; Android 7.0; SM-G892A Bulid/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Moblie Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.5938.132 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.361

Country

fingerprintco-occurrences
FI · Finland11
DE · Germany8
NL · Netherlands7
GB · United Kingdom3
US · United States2
RU · Russia2
TR · Turkey2
JP · Japan1
SG · Singapore1
IN · India1

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH11
AS36680 · Netiface LLC4
AS197170 · TechTies Inc.3
AS210558 · 1337 Services GmbH3
AS201579 · HOSTGNOME LTD3
AS219502 · Storm Industries LLC3
AS401626 · Netiface America, Inc.3
AS198953 · Proton66 OOO2
AS14061 · DigitalOcean, LLC1
AS22295 · Advin Services LLC1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.2
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.1