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Technical Reference Library

Field-ready reference material: IP addressing, ports and protocols, DNS, DHCP, and IPAM — the tables and notes pre-sales engineers actually use.

IPv4 Address & Subnet Calculator →

Network, broadcast, host range, masks, special-use ranges, and subnet splitting.

#1 IPv6 Special-Use & Reserved Ranges

#2 IPv6 Global Unicast Major Blocks

#3 IPv6 Documentation Ranges

#4. IPv6 Multicast & Link-Local Ranges

#5. IPv6 Address Type Summary Table

#6 IPv6 Common Example Subnets

#7 IPv6 Transition Technology Prefixes

#8 - Expansive IPv6 IANA Registry

1. Active Directory Ports

10. Security Tools Ports

11. SaaS Application Ports

12. RMM / MSP Ports

13. High-Risk Ports

2. VoIP / SIP / RTP Ports

3. VPN Ports

4. Kubernetes Ports

5. AWS Ports

6. Azure Ports

7. GCP Ports

8. Firewall Vendor Ports

9. Database Ports

Common Private Subnet Examples (By Subnet Size)

Curated List of Registered Ports — A Practical Reference for Modern Engineers

DHCP Information

DNS Information

Documentation-Only IPv4 Blocks (TEST-NET & Others)

Everything You Need to Know About DNS Records

IP Address Information

IP Address Management (IPAM) Information

IPAM Failure Patterns & Real-World Operational Risk

IPAM Tools, Reference Tables & Learning Resources

IPAM, DNS & DHCP: A Complete DDI Strategy

IPv4 & IPv6 Address Management Fundamentals

IPv4 Bogon Ranges (Static Bogon Table)

IPv4 Class Table

IPv4 Multicast Subrange Breakdown

IPv6 Information

Legacy / DoD / Research IPv4 Blocks

Master Ports List v1 — Comprehensive Port & Protocol Reference

Network Scans: The Foundation of Modern Cybersecurity Visibility

Port & Protocol Information

Ports & Protocols: What Every Sales Engineer Should Know

Private IPv4 Ranges Summary

Reserved & Future-Use IPv4 Ranges

Special-Use IPv4 (the first version)

Special-Use IPv4 Ranges (Detailed Notes)

Subnet Planning, Allocation Models & Growth Forecasting

Understanding DNS and Why It Matters