User-Agent

facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)

first seen 2026-06-13 08:49 · last seen 2026-10-31 08:52 · 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
Meta	22849	6	0.0%

Last 7 days (2201 observations)

Distinct clients per day (last 30 days, peak 290/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	`facebookexternalhit 1.1`
Device class	`bot`
Declared URL	`http://www.facebook.com/externalhit_uatext.php`
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
`t13d3111h2_e8f1e7e78f70_5ac7197df9d2`	22907
`q13d0311h3_55b375c5d22e_f2a83c8e78ae` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, urlsession 6.1.2, urlsession 6.3.3, +5 more.The fingerprint page shows the full measured match list. More on the catalog.	3
`t13d2212h1_3522af84f765_8d633dac7124`	3
`t13d131300_f57a46bbacb6_1bd98dace775`	1
`t13d1313h2_f57a46bbacb6_7f0f34a4126d`	1
`t13d131200_f57a46bbacb6_9249cab70c77`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nn030000_80b089f68b8e_000000000000_000000000000`	17221
`ge20nn030000_6dac75bd47eb_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-httpx 0.28.1.The fingerprint page shows the full measured match list. More on the catalog.	5230
`ge20nn040000_3dccbaa13f05_000000000000_000000000000`	355
`ge20nn030000_0d4c7aba53a3_000000000000_000000000000`	59
`ge20nn020000_5594a17e7e7e_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.	22
`ge20nn040000_8ab5aeda5c38_000000000000_000000000000`	12
`ge20nn030000_042112399351_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0.The fingerprint page shows the full measured match list. More on the catalog.	3
`ge20nn020000_e5a56608905c_000000000000_000000000000`	3
`ge30nn06enus_e3ad47c7992c_000000000000_000000000000`	3
`ge20nn030000_c0d7f5f1a627_000000000000_000000000000`	2

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:4096;2:0;5:16384;6:131072;3:100;4:65536\|26148865\|0\|m,s,p,a`	22846
`1:4096;2:0;5:16384;6:131072;3:100;4:65536;11105:65535;11106:65535;11107:65535;11108:10;11109:10\|26148865\|0\|m,s,p,a`	61
`2:0;4:2097152;3:100;9:1\|10485760\|0\|m,s,p,a`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`6:56+8:0:1380:65535,8:mss,sok,ts,nop,ws::0`	14597
`6:46+18:0:1380:65535,8:mss,sok,ts,nop,ws::0`	1843
`6:58+6:0:1380:65535,8:mss,sok,ts,nop,ws::0`	1680
`6:53+11:0:1380:65535,8:mss,sok,ts,nop,ws::0`	1380
`6:48+16:0:1380:65535,8:mss,sok,ts,nop,ws::0`	973
`6:49+15:0:1380:65535,8:mss,sok,ts,nop,ws::0`	788
`6:55+9:0:1380:65535,8:mss,sok,ts,nop,ws::0`	702
`6:47+17:0:1380:65535,8:mss,sok,ts,nop,ws::0`	324
`6:54+10:0:1380:65535,8:mss,sok,ts,nop,ws::0`	171
`6:52+12:0:1380:65535,8:mss,sok,ts,nop,ws::0`	87

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1380_8`	22892
`43200_2-4-8-1-3_1440_9`	1
`42600_2-4-8-1-3_1420_9`	1
`64240_2-1-1-4_1350_00`	1

QUIC transport params

fingerprint	co-occurrences
`q07_e80dd4933807` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, urlsession 6.3.3, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	3

Country

fingerprint	co-occurrences
`US` · United States	17748
`DE` · Germany	1741
`SG` · Singapore	1732
`GB` · United Kingdom	1694
`CA` · Canada	1

Network (ASN)

fingerprint	co-occurrences
`AS32934` · Facebook, Inc.	22910
`AS396982` · Google LLC	1
`AS7922` · Comcast Cable Communications, LLC	1
`AS206216` · Advin Services LLC	1
`AS14593` · Space Exploration Technologies Corporation	1
`AS21928` · T-Mobile USA, Inc.	1
`AS64294` · Panasonic Avionics Corporation	1

TLS supported groups

fingerprint	co-occurrences
`001d,0017,001e,0019,0018`	5396