Free DNS Time-to-Live Diagnostic Tool

DNS TTL & Caching Health Checker

Analyze your domain's DNS TTL settings under two key lenses: Everyday Page Load Latency vs. Server Migration Readiness.

Caching Performance Score
30 / 100
Evaluates lookup speed vs cache efficiency
Shortest TTL
33 seconds
Fastest record expiration duration
Longest TTL
6 hours (21600s)
Maximum cached retention duration
Records Inspected
52
A, AAAA, CNAME, MX, TXT, NS, SOA
1. Everyday Load Performance
Sub-optimal Latency
Sub-optimal DNS Caching (High Lookup Latency)
Your DNS records have short TTL values. Browsers and ISPs are forced to re-query your DNS frequently, adding unneeded connection latency for visitors unless you are actively migrating servers.
2. Server Migration Agility
Migration Ready
Ready for Fast Server Migration
Your primary web resolution records (A/CNAME) have low TTLs. If you switch web hosts or server IPs today, DNS updates will propagate globally within minutes with minimal downtime.

DNS Record TTL Inventory (mlb.com)

Host / Record Type Target / Value TTL (Duration) Everyday Performance Lens Migration Lens
mlb.com A
34.102.163.158
59.9 minutes (3595s) Optimal Speed 2h Prep Needed
mlb.com NS
ns-cloud-b4.googledomains.com
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-204.awsdns-25.com
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-976.awsdns-58.net
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-1370.awsdns-43.org
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-1997.awsdns-57.co.uk
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-cloud-b1.googledomains.com
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-cloud-b2.googledomains.com
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com NS
ns-cloud-b3.googledomains.com
6 hours (21600s) Optimal Speed 24h Prep Needed
mlb.com SOA
Primary NS: ns-1370.awsdns-43.org (Admin: awsdns-hostmaster.amazon.com)
15 minutes (900s) Lookup Overhead Instant Propagation
mlb.com MX
[Priority 1] mlb-com.mail.protection.outlook.com
10 minutes (600s) Lookup Overhead Instant Propagation
mlb.com TXT
onetrust-domain-verification=b65699a512a948ec984777b9ad7d28f7
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
onetrust-domain-verification=dd8aecd72e714036a95ea068cfe6f2e7
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
anthropic-domain-verification-w0tddh=eUI1DrzYqtNfrirT3GQDfShYK
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
adobe-idp-site-verification=48421df2-6edd-4d7a-9a50-5d6b7ac37140
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
yahoo-verification-key=/7YvIV9kTBbJETYphs2ydo2GBj6XuhvO4P1H1M6dh+o=
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
google-site-verification=XOnG1KFFRFfMJeUU7-uEnjQPrJ5bgfSKLU3n-ddA5o0
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
google-site-verification=ecWDspflVGxmZOFfl5U-feFA50MZguqCygpZH-fHvw0
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
google-site-verification=ewYCvyU3ZIlPv8GRbEfttW-iXf6Rvo4C1lzUgfi2W4k
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
google-site-verification=xLIe2kvVf_RIlRbMuNhQfxu5QhOj38hG38eCHOVRI-Q
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
mgverify=4486080ee27dbe9c532d7c06bd6416c0594bdb2747dc01acfb5e97721389f1c9
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:mailgun.org ~all
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
6cai8ssdT8bfglT/gt8kwoKyhyAgPcWDuCGhXf6NRtlGOxnCwCVxvE0gV8MARuqkl340xHdWjJtLgFXFk4XOtQ==
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
atlassian-domain-verification=g2T53fLDVGlvthuuEp+3tHYaHRCtRg7YE0c6muK0q1eRZToBwzYMwLOUVBbImxpM
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
paloaltonetworks-site-verification=7be9535bc2affb742cb82ebe821a04088380fb53981671210a413b185923dafc
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
postman-domain-verification=9e8cbf6e58c180aceab032d7f85e916683a73fc5f9dceed2fec8ceba7ca719dddf7b8799b8b78e0153cc9769218729171dd7425c1092c8b14967492e31672762
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
MS=ms69694204
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
MS=ms85676836
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
e2ma-verification=m4j3
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
e2ma-verification=0x5bb
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
7zvy2rtgl87v1529vvz467263ttxv00w
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
_rdorsto6f291izaj54fj6l0tgyrlsxh
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
asv=f4d8b04afc0fa2a21f4e5156ec6c2789
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
mandrill_verify.Ug0KyLxAlKlJFADUoUKazw
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
apple-domain-verification=6IYQq9hakr4CM8uN
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
docusign=dd0cbf68-020f-4af4-9785-638db04566ef
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
openai-domain-verification=dv-D9zatZspLcySUfsBz3ytGnq9
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
cloudflare_dashboard_sso=99d69311be411f4639d09940caef8875
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
cursor-domain-verification-ghqnyw=dHOe7fY7Ygl1Al61QPw1JMNrX
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
facebook-domain-verification=6l9n1mpxxnvj1l19nmitlu3e5t9qgu
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
smartsheet-site-validation=oaC-Jj1jFnvmweM2PoQJUhOQtun7sj3s
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com TXT
twilio-domain-verification=5450879a5dddd10b96b14397eb242d58
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com CAA
Direct IP
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb.com A
34.102.163.158
1 hour (3600s) Optimal Speed 2h Prep Needed
mlb-tls.map.fastly.net A
151.101.161.91
33 seconds Lookup Overhead Instant Propagation
www.mlb.com CNAME
mlb-tls.map.fastly.net
41 seconds Lookup Overhead Instant Propagation

Note: This may not be all your DNS records — only the records we were able to find.

Actionable Recommendations & Best Practices
[Performance] Increase TTL for Everyday Traffic

If you are not currently migrating servers, increase your A, AAAA, and CNAME TTL values to at least 3,600s (1 hour) or 86,400s (24 hours). This allows ISPs and browsers to cache your DNS response, cutting initial page connection time.

[Performance] Eliminate Ultra-Low TTLs (< 300s)

Ultra-low TTLs cause excessive DNS query traffic and can bottleneck user connection times. Unless backed by a high-frequency global DNS edge/anycast provider (like Cloudflare or Route53), raise these TTLs.

[Best Practice] Post-Migration TTL Restoration

Once your server migration is complete and verified stable for 24 hours, remember to raise your TTL values back to 3,600s or 86,400s to regain optimal DNS caching performance.

Understanding DNS TTL: Performance vs. Agility

DNS Time-to-Live (TTL) is a numerical setting (measured in seconds) attached to every DNS record. It dictates how long recursive DNS resolvers, ISPs, and web browsers are permitted to cache your server's IP address before requesting a fresh update.

Why Low TTL Hurts Everyday Speed

When you set a low TTL (e.g. 300s / 5 minutes) on a domain that is not migrating, every returning visitor's browser or local ISP must continuously send fresh DNS queries to resolve your server IP. This adds an extra 20ms to 150ms round-trip latency to page load times. For everyday stability, TTLs should be set to 3,600s (1 hour) or 86,400s (24 hours).

How to Manage TTL for Zero-Downtime Migration

If you are planning to switch web hosts or move to a new server IP, follow this two-step process:
1. 24 hours BEFORE migration: Reduce your A and CNAME TTL values to 300s (5 minutes).
2. 24 hours AFTER migration: Once the new IP is verified stable, raise your TTL back to 3,600s or 86,400s to regain maximum DNS caching speed.