TCP SYN (p0f)
4:111+17:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0
first seen 2026-06-16 19:12 · last seen 2026-09-07 09:30 · JSON
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 version | 4 |
|---|---|
| Initial TTL | 111+17 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*44 |
| Window scale | 8 |
| Options layout | mss,nop,ws,nop,nop,sok |
| Quirks | df,id+,ecn |
| 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 |
|---|---|
t13d1812h1_85036bcba153_d41ae481755e | 3 |
t13d221100_231e334592e8_36bf25f296df | 2 |
t13d1813h1_85036bcba153_d339722ba4af | 2 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
t13d3112h1_e8f1e7e78f70_8d633dac7124 | 1 |
t12d210700_76e208dd3e22_f28add8e7af0 | 1 |
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t12d1515h2_8daaf6152771_98afadeeacd9 | 1 |
t13d1515h2_8daaf6152771_98afadeeacd9 | 1 |
t13d0307h2_55b375c5d22e_e31b90bacf3d | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.21.3, wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge20nn010000_a510e5066512_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31, java-httpclient 25.0.3, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
ge11nn040000_608e01151bf4_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge11nn07en00_39c70cc1573e_000000000000_000000000000 | 2 |
po11nn060000_d8e0803a0d25_000000000000_000000000000 | 2 |
ge10nr07enus_b1553efd6980_000000000000_000000000000 | 1 |
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 |
po11nn060000_f35f2e0a87d7_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p | 2 |
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, +43 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-1-3-1-1-4_1460_8 | 13 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
NL · Netherlands | 4 |
DE · Germany | 3 |
HK · Hong Kong SAR China | 2 |
FR · France | 2 |
LT · Lithuania | 2 |
CA · Canada | 1 |
GB · United Kingdom | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS197170 · TechTies Inc. | 3 |
AS24940 · Hetzner Online GmbH | 3 |
AS16276 · OVH SAS | 3 |
AS215930 · CIPHER OPERATIONS DOO BEOGRAD - NOVI BEOGRAD | 3 |
AS213790 · Limited Network LTD | 1 |
AS45753 · Netsec Limited | 1 |
AS153656 · OWGELS INTERNATIONAL CO., LIMITED | 1 |