TCP SYN (p0f)
4:45+19:0:1412:mss*46,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-12 05:09 · last seen 2026-10-23 01:39 · 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 | 45+19 |
| Options length | 0 |
| MSS | 1412 |
| Window size | mss*46 |
| 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 |
|---|---|
t13d191000_9dc949149365_e7c285222651 | 12 |
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t13d1911h2_9dc949149365_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
t13i170900_5b57614c22b0_78e6aca7449b | 4 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 3 |
t13i130900_f57a46bbacb6_e7c285222651 | 2 |
HTTP request (JA4H)
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64952_2-4-8-1-3_1412_7 | 26 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
TH · Thailand | 8 |
CN · China | 8 |
HK · Hong Kong SAR China | 5 |
US · United States | 4 |
TW · Taiwan | 4 |
GB · United Kingdom | 2 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED | 23 |
AS58466 · CHINANET Guangdong province network | 5 |
AS23724 · IDC, China Telecommunications Corporation | 3 |
TLS supported groups
| fingerprint | co-occurrences |
|---|---|
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 4 |
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. | 3 |
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 |
001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog. | 1 |