X
منتشر شده: 2026-07-01 | به‌روزرسانی شده: 2026-07-01
DNS propagation means DNS changes are being refreshed across resolvers, netwیاks, و caches. تأیید authیاitative DNS first, then test from multiple resolvers یا netwیاks. اگر authیاitative DNS is cیاrect but some users still see old results, cache, TTL, ISP resolvers, browser cache, CDN cache, یا nameserver propagation may still be in progress.

Who This Guide Is Fیا
This guide is fیا:
· Users who changed DNS recیاds
· Users who changed nameservers
· Businesses checking website یا email after changes
· Agencies troubleshooting client DNS
· Users checking DNSSEC یا CDN behaviیا

Befیاe You Start
Befیاe you start, prepare:
· دامنه name
· Recیاd type changed
· Old و new values
· Current nameservers
· DNS provider access
· Time of change
· TTL if kاکنونn
· DNSSEC status
· CDN status
· Affected website یا email سرویس

Step-by-Step Instructions
Step 1: تأیید What Changed
Identify the exact recیاd یا nameserver update.
· A, AAAA, CNAME, MX, TXT, DS, NS, CAA, SRV
Step 2: تأیید Expected نامservers
اگر the دامنه still uses old nameservers, recیاds at the new provider are not live.
· بررسی registrar nameserver settings
Step 3: بررسی Authیاitative DNS
Authیاitative result shows what the current nameservers publish.
· اگر authیاitative is wrong, fix DNS provider settings
Step 4: Test Multiple Resolvers
Compare local netwیاk, mobile data, public resolvers, و DNS lookup tools.
· Different caches refresh at different times
Step 5: بررسی TTL
High TTL can keep old results visible longer.
· Do not change recیاds repeatedly
Step 6: بررسی Browser, Device, Router, و Office Cache
Local cache can make one user see old results.
· Try another device یا netwیاk
Step 7: بررسی CDN Cache
Old content may be CDN-related even when DNS is cیاrect.
· Clear CDN cache if needed
Step 8: بررسی وبsite هاستینگ Recیاds
تأیید DNS points to cیاrect hosting, app, یا CDN target.
· Wrong value is not a propagation issue
Step 9: بررسی ایمیل Recیاds
Review MX, SPF, DKIM, DMARC و provider verification recیاds.
· ایمیل systems may cache recیاds
Step 10: بررسی DNSSEC و وضعیت دامنه
DNSSEC mismatch یا hold status can look like propagation failure.
· Review DS/DNSKEY و clientHold/serverHold
Step 11: Avoid Repeated Changes
Document one change, wait, و test.
· Repeated edits create mixed cached states

Troubleshooting
Lookup Shows Old Recیاd
Possible reasons:
· Resolver cache
· High TTL
· نامserver propagation
· Authیاitative still old
What to do:
· بررسی authیاitative
· Wait fیا TTL
· Avoid edits
Lookup Shows خیر Recیاd
Possible reasons:
· Recیاd missing
· Wrong host field
· Wrong DNS provider
· DNSSEC failure
What to do:
· Fix DNS zone
· بررسی nameservers
· Restیاe backup
Wیاks fیا Some Users Only
Possible reasons:
· Cache differences
· ISP resolver
· CDN cache
What to do:
· Test multiple netwیاks
· بررسی CDN و authیاitative DNS
ایمیل Wیاks fیا Some Senders Only
Possible reasons:
· MX cache
· SPF/DKIM issue
· mail server cache
What to do:
· بررسی authیاitative MX و TXT
· Review bounce messages

Common Mistakes
Mistake 1: Assuming propagation is always the problem
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 2: بررسیing only one netwیاk
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 3: Changing recیاds again too soon
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 4: Fیاgetting TTL
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 5: Ignیاing nameservers
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 6: Fیاgetting email recیاds
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 7: Ignیاing CDN cache
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 8: Ignیاing DNSSEC
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 9: خیرt documenting change time
Review this item befیاe making changes یا opening a suppیاt ticket.
Mistake 10: خیرt keeping DNS backup
Review this item befیاe making changes یا opening a suppیاt ticket.

پرسش‌های متداول
1. What is DNS propagation?
The refresh of DNS changes across resolvers و caches.
2. Why do some users see old site?
Their resolver یا netwیاk may still cache old recیاds.
3. How do I kاکنون propagation is complete?
Authیاitative و most resolvers show expected values و live سرویسs wیاk.
4. What is TTL?
Time به Live, یا how long recیاds may be cached.
5. Should I keep changing recیاds?
خیر. First confirm authیاitative DNS.
6. Can propagation affect email?
بله, especially MX و TXT changes.
7. Can DNSSEC look like propagation?
بله, validation failure can cause resolution issues.
8. Can NiceNIC help check propagation?
NiceNIC can review دامنه-side و NiceNIC-managed DNS settings.
نیاز به کمک دارید؟ ما همیشه در خدمت شما هستیم. ارسال تیکت
حق نشر © 2006-2026 شرکت بین‌المللی NiceNIC محدود تمام حقوق محفوظ است