TCP SYN (p0f)
4:43+21:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-22 03:23 · last seen 2026-10-02 04:01 · JSON
Distinct clients per day (last 30 days, peak 19/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 | 43+21 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*20 |
| Window scale | 7 |
| 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 |
|---|---|
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. | 246 |
t12d990700_a40d17a72bcb_4446390ac224 | 21 |
t13d191000_9dc949149365_e7c285222651 | 20 |
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 6 |
t12d490600_730fb1b0ac6a_a1e935682795 | 3 |
t13d1812h1_85036bcba153_d41ae481755e | 2 |
t13d491200_bd868743f55c_7c76daad20ec Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.12.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog. | 246 |
ge11nn040000_08e7224bf8c7_000000000000_000000000000 | 21 |
ge11nr040000_e1d2031bdfea_000000000000_000000000000 | 19 |
ge11nr14zhcn_142314a30a6a_000000000000_000000000000 | 3 |
ge11nn07zhcn_ad6bb88d6320_000000000000_000000000000 | 3 |
ge11nn06enus_00a41989a9bb_000000000000_000000000000 | 2 |
ge11nn15zhcn_9cd8e369418e_000000000000_000000000000 | 2 |
ge11nr13zhcn_445f7bd1cb97_000000000000_000000000000 | 1 |
ge11nn040000_e1d2031bdfea_000000000000_000000000000 | 1 |
ge11nn040000_c41ada48459b_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
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. | 246 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
29200_2-4-8-1-3_1460_7 | 291 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
CN · China | 298 |
SG · Singapore | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS4811 · China Telecom (Group) | 182 |
AS135089 · China Telecom | 58 |
AS58461 · CT HangZhou IDC | 41 |
AS58466 · CHINANET Guangdong province network | 9 |
AS4837 · CHINA UNICOM China169 Backbone | 8 |
AS136907 · HUAWEI CLOUDS | 1 |