TCP SYN (p0f)
4:51+13:0:1380:65535,6:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-07-25 01:28 · last seen 2026-10-28 05:15 · 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 | 4 |
|---|---|
| Initial TTL | 51+13 |
| Options length | 0 |
| MSS | 1380 |
| Window size | 65535 |
| Window scale | 6 |
| 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 |
|---|---|
t13d1515h1_8daaf6152771_0a20fe35d3a5 | 8 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 4 |
t13d1515h1_8daaf6152771_de4a06bb82e3 | 4 |
t13d4412h1_fd39b124ee10_58ed7828516f | 2 |
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nn13enus_9db22d02e17a_000000000000_000000000000 | 7 |
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
ge11nn14enus_4a2973d235de_000000000000_000000000000 | 5 |
ge11nr17frfr_021c223ca66c_000000000000_000000000000 | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
65535_2-4-8-1-3_1380_6 | 19 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
MA · Morocco | 10 |
EG · Egypt | 3 |
IT · Italy | 2 |
US · United States | 1 |
FI · Finland | 1 |
BY · Belarus | 1 |
PH · Philippines | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS36884 · Wana Corporate | 10 |
AS24863 · Link Egypt (Link.NET) | 2 |
AS205636 · NewniX S.r.l. | 2 |
AS174 · Cogent Communications, LLC | 1 |
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom | 1 |
AS41745 · Baykov Ilya Sergeevich | 1 |
AS24835 · Vodafone Data | 1 |
AS132199 · Globe Telecom Inc. | 1 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
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. | 1 |