Quiverstone utilities are the subnet calculator and the live AWS IP range list, in the same console as the client accounts.
ARCHITECT UTILITIES
The AWS reference tools you tab back to ten times a day
Built into the same console where you manage your accounts. No ads, no stale data, no context-switching away from your work.
Try the subnet calculator now →
WHO THIS IS FOR
Built for cloud engineers & consultants who need answers fast
In-context tools that eliminate the bookmark soup and let you stay focused on the work that matters. Architecture, networking, and multi-region planning are specialties inside that work.
🏗️ Cloud Architects
Designing a VPC and need a CIDR sanity check? Use the Subnet Calculator without leaving Quiverstone.
🌐 Network Engineers
Building security group rules around AWS service IP ranges? Get live, parsed views of AWS’s published ranges.
🗺️ Multi-Region Teams
Planning a new region rollout? Check which AWS services are actually available where before you commit.
SUBNET CALCULATOR
CIDR planning for VPC and subnet design
AWS-aware subnet calculator that respects AWS’s /28 minimum subnet size and reserves the 5 addresses AWS reserves per subnet. Visualize the IP address breakdown — total, usable, reserved.
- IPv4 + IPv6 subnet planning
- AWS-specific validation (minimum /28, reserved addresses)
- Visual breakdown of total, usable, and reserved IPs
- Export as CloudFormation or Terraform
📡 AWS IP Lists
Live, parsed view of AWS’s published service IP ranges from the canonical ip-ranges.json file.
- Filter by service (S3, CloudFront, EC2, etc.)
- Filter by region
- Build security group allowlists
- Configure on-prem firewall rules
- Updates automatically when AWS publishes new ranges
🌍 Region Capabilities
Quick lookup of which AWS services are available in which regions — including service-level details.
- Multi-region deployment planning
- Validate customer “we want X in Y region” requests
- Evaluate new regions as they launch
- Service-level availability, not just yes/no
A GROWING TOOLKIT
Why bookmark soup doesn’t work
In-context tools that eliminate the bookmark soup and let you stay focused on the work that matters. The Utilities surface is intentionally extensible. More utilities for that day-to-day work are on the roadmap.
Context switching
Engineers tab out of their work tool to do a 30-second calculation, then forget what they were doing. Productivity death by a thousand cuts.
Paywalls and ads
The good free tools live on five different sketchy sites with paywalls, ads, and crypto-mining scripts. Not acceptable for production work.
Scattered AWS docs
AWS docs for service-region availability are scattered across product pages. Finding an answer takes 10 minutes when it should take 10 seconds.
