TCP SYN (p0f)

4:112+16:0:1460:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-21 07:50 · last seen 2026-10-30 12:29 · JSON

Last 7 days (3 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 TTL112+16
Options length0
MSS1460
Window size8192
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
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.4
t13d3112h1_e8f1e7e78f70_8d633dac7124 Match?Exact match in Thumbprint's published controlled catalog captures: curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.3
t12d860600_e18388e7f3a3_a1e9356827952
t12d650700_0dd215169a35_4446390ac2241
t13d4312h1_c7886603b240_24695f2957a71
t13d131300_f57a46bbacb6_fb48f8b98a291

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr020000_b89ce445e0b3_000000000000_0000000000004
ge11nr08enus_33cbba219825_000000000000_0000000000003
ge11nn05enus_a1be516b8e6e_000000000000_0000000000002
ge11nr04engb_8ddaef5d77af_000000000000_0000000000001
ge11nn040000_8010dedf9a70_000000000000_0000000000001
ge20cn05enus_eeed6042a2dd_4cb3a207adae_400ba86c163b1

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.4
1:4096;2:0;4:65535;5:16384;3:100;6:65536|16777216|0|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
8192_2-1-3-1-1-4_1460_810

User-Agent

fingerprintco-occurrences
Go-http-client/2.04
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/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Safari/605.1.151

Country

fingerprintco-occurrences
SG · Singapore9
DE · Germany2
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC11
AS213438 · ColocaTel Inc.1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,00184
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.4