DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
dupagecounty.gov runs on Amazon AWS, with email via Microsoft 365.
- Hosting network
- Amazon AWSAS16509Amazon AWS
- Managed DNS
- Self-hosted / other
- Microsoft 365
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on Amazon AWS. Stable here since we started watching (Jul 16, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for dupagecounty.gov
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| dupagecounty.gov | A | 0 | 75.2.20.73 | |
| dupagecounty.gov | MX | 0 | primary.us.email.fireeyecloud.com | |
| dupagecounty.gov | MX | 0 | 30 | alt3.us.email.fireeyecloud.com |
| dupagecounty.gov | MX | 0 | 20 | alt2.us.email.fireeyecloud.com |
| dupagecounty.gov | MX | 0 | 10 | alt1.us.email.fireeyecloud.com |
| dupagecounty.gov | MX | 0 | 40 | dupagecounty-gov.mail.protection.outlook.com |
| dupagecounty.gov | TXT | 0 | MS=ms14240378 | |
| dupagecounty.gov | TXT | 0 | zoho-verification=zb56955951.zmverify.zoho.com | |
| dupagecounty.gov | TXT | 0 | v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.protection.outlook.com ~all | |
| dupagecounty.gov | TXT | 0 | knowbe4-site-verification=3b41615c5bdbb731f3156876a53af465 | |
| dupagecounty.gov | TXT | 0 | box-domain-verification=53828220a25fc824486468a4c36b196ca36503299e743287919002d4098e7ca0 | |
| dupagecounty.gov | TXT | 0 | adobe-idp-site-verification=3c15c75c8e667c6c807ccb19ecb8eec4f519006aa0c45845cfe31b4732a41c4e | |
| dupagecounty.gov | TXT | 0 | google-site-verification=rjSx_H8S-cz1KToVIbafaW8BMhEP0KLhdJQgdcYBRUA | |
| dupagecounty.gov | NS | 0 | cmtu.mt.ns.els-gms.att.net | |
| dupagecounty.gov | NS | 0 | cbru.br.ns.els-gms.att.net | |
| dupagecounty.gov | SOA | 86400 | cbru.br.ns.els-gms.att.net rm-hostmaster.ems.att.com 73 10800 3600 604800 86400 | |
| www.dupagecounty.gov | A | 0 | 75.2.20.73 |
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
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About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain