Your Network Fingerprint

Not stored - ephemeral scan only

Every connection reveals signals about the software and OS behind it. This is what we see from yours.

Classification
Web Crawler
slug: webcrawler

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Help build a public reference of HTTP client fingerprints. Submissions are open data.

✓ JA4 · JA4T stored ✗ No IP, ASN, or location ⚠ User-Agent included as-is
JA4t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3
JA4T62727_2-4-8-1-3_1460_7
UAMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
View Database
JA4 TLS fingerprint
t13d1011h2_61a7ad8aa9b6_3fcd1a44f3e3
ProtocolTLS
TLS version1.3
SNIdomain
Cipher suites10
Extensions11
ALPNh2
GREASEabsent
Segment match analysis (1,618 entries in db)
~ JA4-A prefix match (same TLS version / counts / ALPN - cipher & ext hashes differ)
SegmentFieldValueMatchedRarity in db
seg 1 (prefix) Protocol TLS ✓ -
seg 1 (prefix) TLS version TLS 1.3 ✓ 1252 / 1,618 (77.4%)
seg 1 (prefix) SNI domain (SNI present) ✓ 1402 / 1,618 (86.7%)
seg 1 (prefix) Cipher suite count 10 suites ✓ 22 / 1,618 (1.4%)
seg 1 (prefix) Extension count 11 extensions ✓ 256 / 1,618 (15.8%)
seg 1 (prefix) ALPN (first 2 chars) h2 (HTTP/2) ✓ 527 / 1,618 (32.6%)
seg 2 (ciphers) Cipher hash (sorted suite IDs) 61a7ad8aa9b6 ✗ 0 / 1,618 (0.0%)
seg 3 (extensions) Extension hash (types + sig algs) 3fcd1a44f3e3 ✓ 4 / 1,618 (0.2%)
Extension hash seen in DB under different prefix: t13d0911h2_f91f431d341e_3fcd1a44f3e3
Best match record
49 observations
JA4T TCP fingerprint
62727_2-4-8-1-3_1460_7
Window size62,727
Effective window8,029,056 (with scale x128)
MSS1460
Window scaleshift 7
TCP optionsMSS, SACK Permitted, Timestamps, Window Scale
Timestampspresent
OS hintLinux / macOS
IP TTL
119 hops remaining - initial TTL suggests Windows

Signals

  • ~
    JA4 fingerprint matched unknown Known fingerprint in ja4db.com
  • ✗
    TLS GREASE (RFC 8701) Absent Real browsers inject GREASE extension values automatically. Absent on nearly all bot HTTP libraries.
  • ✓
    MSS (max segment size) 1460 bytes - clean Ethernet Standard Ethernet MSS is 1460. Values below 1400 indicate VPN or tunnel encapsulation overhead.
  • ~
    OS inference (TCP timestamps) Linux / macOS Windows omits TCP timestamp option (kind 8) from SYN packets. Linux and macOS always include it.
  • ~
    OS inference (IP TTL) 119 hops remaining - initial TTL suggests Windows Windows initial TTL is 128; Linux/macOS is 64. Subtract observed hops to estimate.
  • ✓
    Network latency - JA4L-C part A 24672 µs (24.67 ms) - consistent with real geographic distance JA4L-C part A: (TCP ack - TCP synack) / 2, approximated as (Accept - SYN capture) / 2. Measures estimated one-way geographic distance. Part B (TLS layer latency) requires server-side timing and is not available here.
  • ✗
    ASN / network type Amazon.com, Inc. (cloud/datacenter) Datacenter and cloud ASNs are heavily associated with automated traffic.
Raw connection data
IP address216.73.216.192
CountryUS
ASN16509
ASN orgAmazon.com, Inc.
User-AgentMozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
ALPNh2
JA4L-C (raw)24672_119
JA4L-C latency24672 µs (24.67 ms) - estimated one-way network latency
JA4L-C client TTL119
TTL119