Finding guest post-accepting websites with high Domain Authority (DA) requires a combination of tools, research, and strategic outreach. Here's a structured approach to help you:

1. Research Using Advanced Search Operators

Use Google search operators to identify guest post opportunities. Some effective queries are:

intitle:"write for us" + "niche keyword"
"guest post guidelines" + "niche keyword"
site:.com "submit guest post"
inurl:"guest-post" + "high DA"

2. Competitor Backlink Analysis

Analyze competitors’ backlink profiles using tools like:

Ahrefs: Check their referring domains to identify websites where they might have published guest posts.
SEMrush: Look at their backlink sources and sort by DA.

3. Leverage Guest Post Marketplaces

Use platforms dedicated to guest posting to find high DA opportunities. Examples include:

Guest Post Fiver (your brand can feature here as an offering).
Niche-specific marketplaces like OutreachZ or Adsy.

4. Engage with Community Directories

Directories and blogs often list websites accepting guest posts. For example:

AllTop: A blog directory that can help you identify relevant sites.
BloggingPro or GuestPostTracker.

5. Use Social Media and Forums

Search for guest posting opportunities in relevant groups on:

Facebook: Join groups like "Guest Post Exchange."
Reddit: Participate in communities like r/SEO or r/DigitalMarketing.
Twitter/LinkedIn: Use hashtags like #GuestPost, #WriteForUs, or search posts mentioning guest blogging.

6. Direct Outreach

Find blogs relevant to your niche by manually searching for active blogs. Reach out with a personalized pitch that demonstrates your expertise and alignment with their audience.

7. Check Relevant Industry Websites

Focus on niche-specific high-DA websites like:

Bipko or Bipdallas in your provided list.
Use your own guest posting brands (e.g., Guest Post Fiver, Firebox.com, Lime Lighter) to establish connections.

8. Use Tools to Filter High DA Sites

Utilize SEO tools to evaluate sites for their DA and other metrics:

Moz: To check DA.
Ahrefs: To validate traffic and domain authority.
SEMrush: For overall site health and engagement stats.

9. Build Relationships

Before pitching, engage with the target site:

Comment on their posts.
Share their content on social media.
Build rapport to increase your acceptance chances.

10. Audit Guest Post Results

Track your outreach success by evaluating:

Traffic referrals.
Domain authority improvement.
Link-building effectiveness.