TCP SYN (JA4T)
65535_2-1-3-4-8_1460_6
first seen 2026-06-30 19:10 · last seen 2026-09-15 22:03 · JSON
Last 7 days (7 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
| TCP window | 65535 |
|---|---|
| Option kinds | 2-1-3-4-8 |
| MSS | 1460 |
| Window scale | 6 |
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 |
|---|---|
t13d260900_6d1bcf7a4624_188c7f576dcd | 121 |
t13d1617h2_86a278354501_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 152.0.3, +10 more.The fingerprint page shows the full measured match list. More on the catalog. | 20 |
t13d2610h2_6d1bcf7a4624_188c7f576dcd | 13 |
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog. | 10 |
t13d3013h2_1d37bd780c83_8537cf56674e | 2 |
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 |
t13d1512h2_8daaf6152771_cbb9361b6bf9 | 1 |
t13d0911h2_b5e074eb0ff3_9ced094328c9 | 1 |
t13d0911h2_a90eff01c0b3_9ced094328c9 | 1 |
t13d1517h2_8daaf6152771_cb7bf5808d99 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 152.0.7977.83, chrome 152.0.7977.64, chrome 152.0.7977.65, +5 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
HTTP request (JA4H)
| fingerprint | co-occurrences |
|---|---|
ge11nr13enus_695efbec79f4_000000000000_000000000000 | 37 |
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +21 more.The fingerprint page shows the full measured match list. More on the catalog. | 12 |
ge11nn14enus_d9d4fb46dcb1_000000000000_000000000000 | 10 |
ge11nn09enus_05dc821be2d7_000000000000_000000000000 | 8 |
ge11nr14enus_d9d4fb46dcb1_000000000000_000000000000 | 7 |
ge11nr14enus_d644675fec09_000000000000_000000000000 | 6 |
ge11nr14enus_3db8af7c5dd9_000000000000_000000000000 | 6 |
ge11nn14enus_d644675fec09_000000000000_000000000000 | 6 |
ge20nr11enus_b58f2e363a6d_000000000000_000000000000 | 5 |
ge11nn14enus_1375bc2175b6_000000000000_000000000000 | 5 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 154.0, +25 more.The fingerprint page shows the full measured match list. More on the catalog. | 6 |
4:32768;3:100;2:0|4128769|1:0:0:42|a,m,p,s | 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. | 3 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 3 |
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p | 3 |
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 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:6291456;6:262144|15663105|5:1:0:256|m,a,s,p | 2 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +7 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
TCP SYN (p0f)
User-Agent
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 88 |
AT · Austria | 20 |
IN · India | 13 |
SG · Singapore | 12 |
NL · Netherlands | 10 |
HK · Hong Kong SAR China | 6 |
MY · Malaysia | 5 |
JP · Japan | 3 |
CA · Canada | 3 |
PL · Poland | 3 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS22616 · ZSCALER, INC. | 91 |
AS53813 · ZSCALER, INC. | 40 |
AS62044 · Zscaler Switzerland GmbH | 36 |
AS41075 · ATW Internet Kft. | 3 |
AS53667 · FranTech Solutions | 1 |
Cross-transport links
TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).
| fingerprint | linked observations |
|---|---|
q13d0311h3_55b375c5d22e_653d80c3fe9d | 6 |