TCP SYN (p0f)
4:59+5:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0
first seen 2026-06-20 17:24 · last seen 2026-10-30 11:41 · JSON
Last 7 days (14 observations)
Distinct clients per day (last 30 days, peak 17/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 | 59+5 |
| Options length | 0 |
| MSS | 1460 |
| Window size | mss*44 |
| 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. | 56 |
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. | 19 |
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.6.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
t13d1518h2_8daaf6152771_4980c97edce0 | 3 |
t13d4312h1_c7886603b240_b26ce05bbdd6 | 2 |
t13d1812h1_85036bcba153_b26ce05bbdd6 | 1 |
t13d311100_e8f1e7e78f70_d41ae481755e Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.11.0, rust-hyper 1.12.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
t13d1812h1_85036bcba153_d41ae481755e | 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. | 56 |
ge20nn11enus_dbdd560af68b_000000000000_000000000000 | 18 |
ge20nn08enus_1945e0741196_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2.The fingerprint page shows the full measured match list. More on the catalog. | 5 |
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. | 2 |
ge20nr12enus_f8a3a1e39dc3_000000000000_000000000000 | 2 |
ge11nn05en00_8565061f331f_000000000000_000000000000 | 1 |
ge11nn040000_e1d2031bdfea_000000000000_000000000000 | 1 |
ge11nn050000_3658ef221638_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.21.4, wget 1.25.0, wget 1.21.3.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
ge20nr08enus_1945e0741196_000000000000_000000000000 | 1 |
ge20nr11enus_dbdd560af68b_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. | 57 |
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 152.0.7977.83, +81 more.The fingerprint page shows the full measured match list. More on the catalog. | 21 |
2:0;3:100;4:2097152;9:1|10420225|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +2 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_7 | 88 |
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
GB · United Kingdom | 45 |
US · United States | 43 |
HK · Hong Kong SAR China | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS212238 · Datacamp Limited | 76 |
AS3257 · GTT Communications Inc. | 6 |
AS135392 · MillenialHost Limited | 2 |
AS36352 · HostPapa | 1 |
AS26383 · Baxet Group Inc. | 1 |
AS6079 · RCN | 1 |
AS210906 · UAB Bite Lietuva | 1 |
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. | 58 |
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 |
0a0a,001d,0017,0018,0019 | 1 |