User-Agent

Mozilla/5.0 (compatible; Barkrowler/0.9; +https://babbar.tech/crawler)

first seen 2026-06-21 20:12 · last seen 2026-10-30 16:05 · JSON

Bot verification

This User-Agent declares a bot or user-triggered fetcher. Each connection's IP is checked at ingest against the verification channels the operator publishes — its crawler IP ranges and, where documented, forward-confirmed reverse DNS. A claim either channel confirms is verified; one confirmed by neither — outside the ranges, inside a different operator's, or failing the DNS check — is unverified. Meta publishes its network rather than crawler ranges, so its verified claims are network-confirmed and its unconfirmed misses are unverified claims, not proven spoofs. Telegram publishes network ranges rather than fetcher ranges, and its misses are treated the same way. bot-claim anomalies →

claims	verified	unverified	unverified rate
Barkrowler	362	0	0.0%

Last 7 days (65 observations)

Distinct clients per day (last 30 days, peak 12/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

Browser / client	`Barkrowler 0.9`
Device class	`bot`
Declared URL	`https://babbar.tech/crawler`
Note	`inferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above`

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
`t13d491200_bd868743f55c_7c76daad20ec` Match?Exact match in Thumbprint's published controlled catalog captures: java-urlconnection 17.0.12.The fingerprint page shows the full measured match list. More on the catalog.	586

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn070000_cfd688ca49e2_000000000000_000000000000`	354
`ge11nn060000_9078d5dd083b_000000000000_000000000000`	230
`ge11nn050000_7d5093fcb167_000000000000_000000000000`	1
`ge11nn060000_ce3694e9b763_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:53+11:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:0`	584
`4:51+13:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:0`	1
`4:54+10:0:1460:mss*44,8:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_8`	584

Country

fingerprint	co-occurrences
`FR` · France	586

Network (ASN)

fingerprint	co-occurrences
`AS210743` · BABBAR SAS	586

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019,001e,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31.The fingerprint page shows the full measured match list. More on the catalog.	193