Hostname to IP Address Resolution
Every device connected to the internet relies on numerical IP addresses to route data, but humans rely on memorable hostnames. Hostname-to-IP resolution bridges this gap by mapping human-friendly network labels into the precise IP destinations required to establish web connections.
FORWARD DNS LOOKUP
Hostname to IP: A forward lookup converts a human-readable domain or server hostname (e.g., www.getmyipaddress.co.uk) into its underlying numerical IP address so web browsers can connect to the target web server.
REVERSE DNS LOOKUP (PTR)
IP to Hostname: A reverse lookup performs the opposite function�querying a numerical IP address to discover its associated server hostname or domain name using DNS PTR records.
A & AAAA ADDRESS RECORDS
Direct IP Mapping: Hostnames bind directly to network addresses via DNS records. An A Record links a hostname to an IPv4 address, while an AAAA Record maps it to an IPv6 address.
CNAME & HOSTNAME ALIASES
Canonical Names: A CNAME record aliases one hostname to another canonical hostname rather than an IP directly. The resolver then resolves the ultimate target hostname into its final destination IP address.
Public IP Address Infrastructure
Your public IP address acts as the gateway to your home or business network. Assigned by your Internet Service Provider (ISP), it allows external web servers to route requested data�like web pages, images, and video streams�directly back to your router.
WHAT IS A PUBLIC IP?
Global Accessibility: Unlike private local addresses (used inside your Wi-Fi network), a public IP address is unique across the entire global internet. It is the single address visible to every website, online service, and server you connect to.
GEOLOCATION & ISP MAPS
Approximate Location: Public IPs map to your ISP's nearest regional routing hub. While this pinpoints your general city and region for localized content, it never reveals your physical home address or street name.
REVERSE DNS & AS NUMBERS
Network Hostnames: Every public IP belongs to an Autonomous System Number (ASN). Reverse DNS lookups translate numerical IPs back to their ISP domain hostnames to verify server origins and network integrity.
Hostnames, Domains & DNS Lookups
Computers communicate natively using raw numbers, but humans remember words. Because humans type domain names while network routers route numerical IP addresses, the Domain Name System (DNS) translates human-readable names into numeric IP destinations in milliseconds.
DOMAIN NAMES
Domain Name: A friendly, registered name for a website structure — such as getmyipaddress.co.uk.
HOSTNAMES
Hostname: The specific device or server name within a domain hierarchy (e.g., mail or www).
HOW DNS LOOKUP WORKS
1. Browser Cache: Your device checks if it recently saved the IP address locally.
2. Recursive Resolver: Request travels to your ISP or configured DNS server.
3. Root & TLD Servers: Resolver locates Top-Level Domain servers (.com / .co.uk).
4. Authoritative Server: Returns the precise IP address mapping for the domain.
Ping Testing & Latency Metrics
Whenever you test connectivity or troubleshoot timeouts, ping utilities send ICMP Echo Request packets to evaluate network health, server reachability, and round-trip response time (latency) in milliseconds (ms).
HOW PING WORKS
ICMP Protocol: Sends small ICMP Echo Request packets to a target IP or hostname and measures the exact round-trip response time (RTT) in milliseconds (ms).
LATENCY BENCHMARKS
Under 20ms: Optimal speed for gaming & live streams.
20ms – 50ms: Fast standard web browsing.
100ms+: High delay or potential network buffering.
DIAGNOSING NETWORK ISSUES
Packet Loss: Unanswered echo requests indicate network congestion, hardware failure, or firewalls blocking ICMP traffic.
Jitter: High variance in response times signals unstable routing or local Wi-Fi interference.