TCP SYN (p0f)

4:118+10:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-17 19:21 · last seen 2026-10-31 09:29 · 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 TTL118+10
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
t13d1812h1_85036bcba153_b26ce05bbdd64
t13d191000_9dc949149365_e7c2852226514
t13d181000_e8a523a41297_78e6aca7449b3
t12d860600_e18388e7f3a3_a1e9356827952
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.2
t13d1812h1_85036bcba153_d41ae481755e2
t13d221100_231e334592e8_36bf25f296df2
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
t13d1312h2_f57a46bbacb6_ab7e3b40a677 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, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1
t12d4907h1_730fb1b0ac6a_8587f467d9ea1

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.4
ge10nr030000_341eb0d8946c_000000000000_0000000000002
ge11nn06ru00_8c813b6f2fda_000000000000_0000000000002
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.2.0, php-guzzle 8.1.0, php-guzzle 8.3.1, +13 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn040000_e1d2031bdfea_000000000000_0000000000001
ge11nn010000_4a823118b9ba_000000000000_0000000000001
he11nn050000_b223a0ebb0b5_000000000000_0000000000001
ge11nr08engb_aea191eebe67_000000000000_0000000000001
ge11nr06enus_aeac3047b50b_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.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1460_824

User-Agent

fingerprintco-occurrences
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/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.2033
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)2
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.361
Mozilla/5.01
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)1
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.361
Go-http-client/2.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.361

Country

fingerprintco-occurrences
DE · Germany7
US · United States7
PL · Poland4
NL · Netherlands2
IN · India2
LT · Lithuania2
GB · United Kingdom1
SE · Sweden1
ID · Indonesia1

Network (ASN)

fingerprintco-occurrences
AS401626 · Netiface America, Inc.4
AS213790 · Limited Network LTD3
AS201814 · MEVSPACE sp. z o.o.3
AS199959 · GWY IT PTY LTD3
AS205759 · Ghosty Networks LLC2
AS141995 · Contabo Asia Private Limited2
AS20473 · The Constant Company, LLC1
AS49981 · WorldStream B.V.1
AS142430 · DIGI VPS1
AS396839 · TekTonic1

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, winhttp 10.0.20348.1, +2 more.The fingerprint page shows the full measured match list. More on the catalog.3
001d,0017,001e,0019,00181
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
0017,0019,001c,001b,0018,001a,0016,000e,000d,000b,000c,0009,000a1