TCP SYN (p0f)
4:49+15:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-12 01:11 · last seen 2026-09-15 22:37 · JSON
Last 7 days (5 observations)
Distinct clients per day (last 30 days, peak 3/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 | 49+15 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*29 |
| Window scale | 10 |
| 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 |
|---|---|
t13i1909h2_9dc949149365_97f8aa674fd9 | 43 |
t12d610700_8a10cb45a794_4446390ac224 | 4 |
t13d1313h2_f57a46bbacb6_9249cab70c77 | 3 |
t13i131000_f57a46bbacb6_ab7e3b40a677 | 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 |
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 |
t13d190900_9dc949149365_97f8aa674fd9 | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge20nr030000_80b089f68b8e_000000000000_000000000000 | 30 |
ge20nr030000_ff50983941c1_000000000000_000000000000 | 12 |
ge11nn040000_4f6f4aad0c1e_000000000000_000000000000 | 4 |
ge11nr030000_0db47b7d240d_000000000000_000000000000 | 2 |
ge20nn020000_fb4f949fd323_000000000000_000000000000 | 2 |
ge11nn030000_0db47b7d240d_000000000000_000000000000 | 1 |
ge20nr040000_be74ea4f9dce_000000000000_000000000000 | 1 |
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge11nn040000_e1d2031bdfea_000000000000_000000000000 | 1 |
ge20nr020000_fb4f949fd323_000000000000_000000000000 | 1 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog. | 43 |
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p | 3 |
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 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
42340_2-4-8-1-3_1460_10 | 51 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 28 |
GB · United Kingdom | 15 |
SG · Singapore | 7 |
FR · France | 3 |
HK · Hong Kong SAR China | 1 |
CN · China | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS20473 · The Constant Company, LLC | 46 |
AS16509 · Amazon.com, Inc. | 6 |
AS398722 · Censys, Inc. | 1 |
AS4134 · CHINANET BACKBONE | 1 |
AS150436 · Byteplus Pte. Ltd. | 1 |