TCP SYN (p0f)
6:51+13:0:1440:mss*45,9:mss,sok,ts,nop,ws:flow:0
first seen 2026-09-08 13:35 · last seen 2026-09-14 12:19 · JSON
Last 7 days (1 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 version | 6 |
|---|---|
| Initial TTL | 51+13 |
| Options length | 0 |
| MSS | 1440 |
| Window size | mss*45 |
| Window scale | 9 |
| Options layout | mss,sok,ts,nop,ws |
| Quirks | flow |
| 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 |
|---|---|
t13d4907h2_0d8feac7bc37_7395dae3b2f3 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
t12d1515h2_8daaf6152771_4d8a99c1bc01 | 1 |
t13d521100_b262b3658495_8e6e362c5eac | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
ge20nn05enus_f649ff7cdbc1_000000000000_000000000000 | 1 |
ge11nn050000_2469c960a647_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;3:1000;4:6291456;5:16384;6:262144|15663105|0|m,a,s,p | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64800_2-4-8-1-3_1440_9 | 4 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
curl/8.7.1 | 2 |
Adnet-Proxy-Verification/1.0 | 1 |
Mozilla/5.0 (compatible; GeniusDataBot/1.0; +https://geniusdata.com) | 1 |
Country
| fingerprint | co-occurrences |
|---|---|
HK · Hong Kong SAR China | 3 |
FR · France | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS153771 · Heptasky Hong Kong Limited | 3 |
AS16276 · OVH SAS | 1 |