TCP SYN (p0f)

4:113+15:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-14 03:43 · last seen 2026-08-28 03:03 · JSON

Inconsistencies

User-Agents observed with this fingerprint that contradict what it proves at the wire. all inconsistencies →

fingerprint User-Agent claims wire shows confidence seen first seen last seen

4:113+15:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWe…

User-Agent claims Android

TCP SYN initial TTL 113+15 indicates Windows

The initial TTL is set by the sending kernel (64 on Unix-like systems, 128 on Windows) and survives NAT. But VPNs, proxies and tunnels legitimately replace the sending stack, so this check never exceeds medium confidence.

Full User-Agent	Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36
Observed TTL	113+15 (observed + path distance → initial)
Claimed OS	Android
Confidence	low — single sighting of an environmental signal

low

2026-08-28

4:113+15:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac…

User-Agent claims iOS

TCP SYN initial TTL 113+15 indicates Windows

Full User-Agent	Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1
Observed TTL	113+15 (observed + path distance → initial)
Claimed OS	iOS
Confidence	low — single sighting of an environmental signal

low

2026-08-27

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	`113+15`
Options length	`0`
MSS	`1440`
Window size	`mss*44`
Window scale	`8`
Options layout	`mss,nop,ws,nop,nop,sok`
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
`t13d1717h2_5b57614c22b0_3cbfd9057e0d` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	18
`t13d1716h2_5b57614c22b0_0c27189014cf` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	14
`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.	2
`t13d2913h1_723694b0fccc_5671b5df5029`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`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.	13
`ge20nn11enus_3901d4197baf_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	9
`ge20nr11enus_3901d4197baf_000000000000_000000000000`	7
`ge20nr09enus_bfc092dff6c6_000000000000_000000000000`	2
`ge20nn12enus_ec76ac8038e6_000000000000_000000000000`	1
`ge11nr11lvlv_835281d8e5d9_000000000000_000000000000`	1
`ge20nn16nbno_94fdc06e0694_000000000000_000000000000`	1
`ge20nr16nbno_94fdc06e0694_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`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.	5
`1:65536;2:0;4:131072;5:16384\|12517377\|9:0:0:22\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|13:0:0:42\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|7:0:0:42\|m,p,a,s`	2
`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.	2
`1:65536;2:0;4:131072;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-1-3-1-1-4_1440_8`	35

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0`	32
`Mozilla/5.0 (Linux; Android 13; Pixel 7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.36`	2
`Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.1`	1

Country

fingerprint	co-occurrences
`ID` · Indonesia	32
`PK` · Pakistan	2
`CO` · Colombia	1

Network (ASN)

fingerprint	co-occurrences
`AS9657` · Melsa-i-net AS	32
`AS138590` · Prime Networks	2
`AS262186` · TV AZTECA SUCURSAL COLOMBIA	1

fingerprint	co-occurrences
`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.	5
`1:65536;2:0;4:131072;5:16384\|12517377\|9:0:0:22\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|11:0:0:42\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|13:0:0:42\|m,p,a,s`	3
`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.	3
`1:65536;2:0;4:131072;5:16384\|12517377\|7:0:0:42\|m,p,a,s`	2
`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.	2
`1:65536;2:0;4:131072;5:16384\|12517377\|9:0:0:42\|m,p,a,s`	1