TCP SYN (p0f)
4:52+12:0:1460:mss*44,14:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-09-15 01:10 · last seen 2026-10-23 22:37 · JSON
Distinct clients per day (last 30 days, peak 15/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 version | 4 |
|---|---|
| Initial TTL | 52+12 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*44 |
| Window scale | 14 |
| Options layout | mss,sok,ts,nop,ws |
| Quirks | df,id+ |
| Payload class | 0 |
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)
| fingerprint | co-occurrences |
|---|---|
t13d3013h2_1d37bd780c83_8537cf56674e | 15 |
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 154.0.8037.57, chrome 152.0.7977.64, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn030000_bf75ddd0bb29_000000000000_000000000000 | 15 |
ge20nr12zhcn_54b4638ab28b_000000000000_000000000000 | 4 |
ge20nn13zhcn_0c2c1d640f3e_000000000000_000000000000 | 2 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 15 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_14 | 21 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
JP · Japan | 6 |
MT · Malta | 3 |
US · United States | 2 |
SE · Sweden | 2 |
LT · Lithuania | 2 |
KR · South Korea | 1 |
BR · Brazil | 1 |
HK · Hong Kong SAR China | 1 |
ES · Spain | 1 |
TR · Turkey | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS38136 · Akari Networks | 6 |
AS200805 · Melita Limited | 3 |
AS40676 · Psychz Networks | 2 |
AS49770 · Internetport Sweden AB | 2 |
AS61272 · UAB Bacloud | 2 |
AS9009 · M247 Europe SRL | 1 |
AS63023 · GTHost | 1 |
AS55720 · Gigabit Hosting Sdn Bhd | 1 |
AS206991 · Iksir Internet Hizmetleri A.S. | 1 |
AS209881 · LLC "Vash internet partner" | 1 |
TLS supported groups
| fingerprint | co-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. | 15 |