Stop Letting VPC IP Conflicts Block Your Progress

April 9, 2025

Connect VPCs with Overlapping IP Ranges — Without NAT, Renaming, or Complex Routing

TL;DR: Connect Overlapping VPCs Without the Pain

  • Subnet overlaps between VPCs are inevitable — default IP ranges like 172.31.0.0/16 cause conflicts across accounts, regions, and partners.
  • Traditional fixes like NAT, CIDR renumbering, and proxies are disruptive, complex, and hard to scale.
  • noBGP connects VPCs privately even with overlapping IPs, with no need for NAT, IP renaming, or complex routing.
  • Setup is simple: deploy noBGP code in each VPC — no public IPs, no subnet translation, no infrastructure changes.
  • Ideal for DevOps, cloud architects, and IT teams who need conflict-free, scalable multi-VPC networking.

If you’re running multiple VPCs across AWS accounts, regions, or environments, subnet overlap and conflicting CIDR ranges are inevitable. Maybe your team used the default 172.31.0.0/16 CIDR block in staging and production. Or maybe a partner’s VPC has the same IP range as yours. Now what?

VPC peering fails. Connectivity breaks. Your options are limited.

You could:

  • Try renumbering the CIDRs (disruptive and risky)
  • Add NAT and proxy layers (complex and brittle)
  • Build isolated workarounds (slow and hard to scale)

Or you can deploy noBGP.

✅ noBGP Solves Overlapping VPC Subnet Conflicts Instantly

noBGP creates private connections between overlapping VPC networks — even when CIDR blocks conflict — without requiring subnet changes or NAT workarounds. It just works.

  • 🚫 No need to re-IP or rename VPC CIDRs
  • 🔒 No NAT, VPN, or tunneling setup required
  • 🔄 No impact to your existing infrastructure

🧠 No deep networking knowledge needed

🔧 How It Works

  1. Sign-up for a noBGP account
  2. Deploy code in each VPC
  3. Connect securely without public IPs or subnet translation

Whether it’s two VPCs or twenty — across accounts, clouds, or teams — noBGP lets you build connections without conflict.

VPC to VPC using noBGP graphic
VPC-to-VPC Networking made simple

👨‍💻 Who This Is For

This is for:

  • DevOps teams managing multi-account AWS environments
  • Cloud architects hitting CIDR collision limits
  • Platform engineers who’ve run into VPC peering restrictions
  • IT teams building staging, QA, or partner networks with overlapping IPs

🚀 Ready to eliminate VPC subnet overlap headaches?

Start building smarter, conflict-free VPC connectivity — without changing a single IP address.

👉 [Try noBGP free] or [Get a demo]

🧠 Frequently Asked Questions (FAQ)

❓ Can I peer two VPCs with the same IP range?

Not with AWS VPC peering — it will fail. But noBGP allows you to connect overlapping CIDRs without renaming or NAT.

❓ What’s the default AWS VPC IP range?

By default, AWS VPCs use 172.31.0.0/16, which often leads to CIDR block conflicts when multiple environments are created.

❓ Does this replace VPN or NAT gateways?

Yes. noBGP eliminates the need for NAT or VPNs when connecting private VPCs — no overlapping subnet issues.

Reinventing networking to be simple, secure, and private.
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