Your Network Fingerprint
Not stored - ephemeral scan onlyEvery connection reveals signals about the software and OS behind it. This is what we see from yours.
Classification
Web Crawler
slug:
webcrawler
JA4
TLS fingerprint
t13d1010h2_61a7ad8aa9b6_8578f008a1b0
| Protocol | TLS |
| TLS version | 1.3 |
| SNI | domain |
| Cipher suites | 10 |
| Extensions | 10 |
| ALPN | h2 |
| GREASE | absent |
Segment match analysis
(1,471 entries in db)
No exact or prefix match in ja4db
| Segment | Field | Value | Matched | Rarity in db |
|---|---|---|---|---|
| seg 1 (prefix) | Protocol | TLS |
✗ | - |
| seg 1 (prefix) | TLS version | TLS 1.3 |
✗ | 1118 / 1,471 (76.0%) |
| seg 1 (prefix) | SNI | domain (SNI present) |
✗ | 1270 / 1,471 (86.3%) |
| seg 1 (prefix) | Cipher suite count | 10 suites |
✗ | 22 / 1,471 (1.5%) |
| seg 1 (prefix) | Extension count | 10 extensions |
✗ | 166 / 1,471 (11.3%) |
| seg 1 (prefix) | ALPN (first 2 chars) | h2 (HTTP/2) |
✗ | 487 / 1,471 (33.1%) |
| seg 2 (ciphers) | Cipher hash (sorted suite IDs) | 61a7ad8aa9b6 |
✗ | 0 / 1,471 (0.0%) |
| seg 3 (extensions) | Extension hash (types + sig algs) | 8578f008a1b0 |
✗ | 0 / 1,471 (0.0%) |
JA4T
TCP fingerprint
62727_2-4-8-1-3_1460_7
| Window size | 62,727 |
| Effective window | 8,029,056 (with scale x128) |
| MSS | 1460 |
| Window scale | shift 7 |
| TCP options | MSS, SACK Permitted, Timestamps, Window Scale |
| Timestamps | present |
| OS hint | Linux / macOS |
IP TTL
119 hops remaining - initial TTL suggests Windows
Signals
-
~
JA4 fingerprint Not in database Novel or rare fingerprint - not 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 24502 µs (24.5 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.
Contribute to the Database
Submit your fingerprint to the public archive. Only TLS, TCP, and HTTP fingerprint signals are recorded - no IP address, location, or ASN is stored. Note that your User-Agent string will be included as-is.
Raw connection data
| IP address | 216.73.216.43 |
| Country | US |
| ASN | 16509 |
| ASN org | Amazon.com, Inc. |
| User-Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
| ALPN | h2 |
| JA4L-C (raw) | 24502_119 |
| JA4L-C latency | 24502 µs (24.5 ms) - estimated one-way network latency |
| JA4L-C client TTL | 119 |
| TTL | 119 |