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googleusercontent.com

Query #10 • Type: ALL • Date: 2026-04-13 06:55:03 • Duration: 267ms
Re-query
13 Pass 3 Warning 0 Error

NS Records
Found 4 nameserver(s) for googleusercontent.com:
NS ns2.google.com → 216.239.34.10 [TTL: 18528]
NS ns4.google.com → 216.239.38.10 [TTL: 18528]
NS ns3.google.com → 216.239.36.10 [TTL: 18528]
NS ns1.google.com → 216.239.32.10 [TTL: 18528]
Multiple Nameservers
Good. You have 4 nameservers. RFC 2182 recommends at least 2 nameservers for redundancy.
NS A Records
Good. All nameservers have A records (IP addresses). This is required for DNS resolution.
Different Subnets
Good. Your nameservers are on 4 different subnets, providing better redundancy.
Public IP Addresses
Good. All nameserver IP addresses are public.

SOA Record
Primary NS: ns1.google.com
Admin Email: dns-admin@google.com
Serial: 898503807
Refresh: 900s (15 minutes)
Retry: 900s (15 minutes)
Expire: 1800s (30 minutes)
Minimum TTL: 60s (1 minutes)
SOA Serial Format
Serial 898503807 does not follow the YYYYMMDDnn format. This is acceptable but the recommended format helps with debugging.
SOA Refresh
Refresh value 900s (15 minutes) is outside the recommended range of 1200-43200 seconds.
SOA Retry
Retry value 900s (15 minutes) looks good.
SOA Expire
Expire value 1800s (30 minutes) is lower than recommended. Should be at least 1 week (604800s).
SOA Minimum TTL
Minimum TTL 60s (1 minutes) is OK. RFC 2308 recommends 1-3 hours for negative caching.

A Records
Found 1 A record(s):
A 192.178.24.33 [TTL: 300] PTR: lcsofa-av-in-f1.1e100.net
Public IP Check
Good. All A record IPs are public addresses.
Reverse DNS (PTR)
Good. All IPs have reverse DNS (PTR) records.

IPv6 Support
Found 1 AAAA record(s). IPv6 is enabled.
AAAA 2a00:1450:4017:820::2001 [TTL: 300]

MX Records
No MX records found for googleusercontent.com. Email delivery to this domain may not work.

TXT Records
Found 1 TXT record(s):
TXT v=spf1 include:_spf.google.com ?all [TTL: 3600]
SPF Record
Good. An SPF record was found. This helps prevent email spoofing.
DMARC Record
Good. A DMARC record was found at _dmarc.googleusercontent.com: v=DMARC1; p=none; rua=mailto:mailauth-reports@google.com

WWW A Record
Good. www.googleusercontent.com resolves.
A www.googleusercontent.com → 142.251.208.97 [TTL: 48]
WWW IP Public Check
Good. WWW IP addresses are public.