DNS 'ANY', 'A', 'AAAA', 'TXT', 'MX', and 'CNAME' responses for known forward DNS names

Study Details

Study

Forward DNS (FDNS)

Author

Project Sonar | Rapid7

Contact

Rapid7 Labs

Dataset Details

This dataset contains the responses to DNS requests for all forward DNS names known by Rapid7's Project Sonar. Until early November 2017, all of these were for the 'ANY' record with a fallback A and AAAA request if necessary. After that, the ANY study represents only the responses to ANY requests, and dedicated studies were created for the A, AAAA, CNAME and TXT record lookups with appropriately named files. The file is a GZIP compressed file containing the name, type, value and timestamp of any returned records for a given name in JSON format.

Dataset Schema

Full Dataset Listing

Existing Open Data users can sign in for access. See the About page for information on requesting access.

File Name SHA1-Fingerprint Size Updated At
2026-04-03-1775250549-fdns_any.json.gz
cfe688be22c8f2ccea2b08872d9836c63e42ed11
76.1 GB April 4, 2026
2026-04-03-1775240870-fdns_caa.json.gz
12feac0f387d4be9808fcb0d4cc9dbb13db3045e
5.9 GB April 4, 2026
2026-04-03-1775237155-fdns_mx.json.gz
a8e295d53a681a46c632f8385b4d75c50b652f8f
7.1 GB April 4, 2026
2026-04-03-1775235440-fdns_cname.json.gz
75abd25f5b9706de9ec0d29b9b5d2b8bb4b8b3f2
4.0 GB April 4, 2026
2026-04-03-1775176307-fdns_aaaa.json.gz
f73ce7d1a3200c18717bf5832ff8cae242dbc0c8
10.8 GB April 3, 2026
2026-04-03-1775175790-fdns_a.json.gz
0f3776d71329989733adab0a3f77cb7463fe0b2f
37.0 GB April 3, 2026
2026-04-03-1775175232-fdns_ns.json.gz
bfec4e1b5da8bd12e93f87099e6d859c21b38565
16.6 GB April 3, 2026
2026-04-03-1775174687-fdns_txt.json.gz
7b3c20462b664afd229e518b1744eb197a692bfc
14.2 GB April 3, 2026
2026-04-01-1775003637-fdns_txt_mx_dmarc.json.gz
b448adc122682914351705a71172e08088607358
79.5 MB April 1, 2026
2026-04-01-1775002468-fdns_txt_mx_mta-sts.json.gz
8fd9f1d390ad3e4445d818af686329ce9f92d60e
23.8 MB April 1, 2026