TCP SYN (p0f)

6:250+5:0:1440:62587,7:mss,sok,ts,nop,ws:flow:0

first seen 2026-08-16 08:31 · last seen 2026-10-15 01:30 · 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 version6
Initial TTL250+5
Options length0
MSS1440
Window size62587
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksflow
Payload class0

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)

fingerprintco-occurrences
t13d190900_9dc949149365_97f8aa674fd93
t12d080800_723ebca51f63_9d38f905c14d2
t13d5212h2_b262b3658495_8e6e362c5eac1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_e1d2031bdfea_000000000000_0000000000002
ge11nn05enus_16c17714041f_000000000000_0000000000002
ge11nn040000_e1d2031bdfea_000000000000_0000000000001
ge20nn09en00_9507e94052e1_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0|00|0|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
62587_2-4-8-1-3_1440_76

User-Agent

fingerprintco-occurrences
visionheight.com/scan Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) Chrome/126.0.0.0 Safari/537.363
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.362
Iframely/1.3.1 (+https://iframely.com/docs/about) Atlassian1

Country

fingerprintco-occurrences
US · United States6

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.3
AS14618 · Amazon.com, Inc.3

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1