Public IP Address Lookup & Inspector
Check your active public IP address or inspect external IPv4, IPv6, and domain routes. Real-time network location, ISP, ASN, and connection metadata.
🔍 Inspect Any IP Address or Domain
1. The Architecture of Internet Protocol (IP) Addressing
An Internet Protocol (IP) address is a numerical label assigned to every device participating in a computer network that uses the Internet Protocol for communication. Acting as a digital routing coordinate, an IP address ensures that packets of data reach their intended destination across the worldwide web.
Public IP addresses are assigned to your home router or office gateway by your Internet Service Provider (ISP). Knowing your public IP is essential for configuring firewall allowlists, establishing secure SSH/VPN tunnels, hosting local developer servers, and verifying DNS propagation.
2. IPv4 vs. IPv6 Technical Specifications
| Specification | IPv4 Standard | IPv6 Standard |
|---|---|---|
| Address Length | 32 bits (4 bytes) | 128 bits (16 bytes) |
| Address Space | $2^{32} \approx 4.29 \times 10^9$ addresses | $2^{128} \approx 3.4 \times 10^{38}$ addresses |
| Notation Format | Dotted-decimal (e.g. 192.0.2.1) |
Hexadecimal colon-separated (e.g. 2001:db8::1) |
| Header Checksum | Included in header | Omitted (delegated to link/transport layers) |
| Configuration | Manual or DHCP | Stateless Address Autoconfiguration (SLAAC) or DHCPv6 |
3. Public vs. Private IP Addresses: What is the Difference?
Devices operate on two distinct addressing layers to conserve global routing resources:
- Private IP Addresses: Used inside local networks (LANs). Standardized under RFC 1918 (such as
192.168.x.x,10.x.x.x, and172.16.x.x–172.31.x.x). These addresses are non-routable on the public internet and exist only within your home or office router sandbox. - Public IP Addresses: Globally routable addresses assigned to your outward-facing modem by your ISP. Network Address Translation (NAT) maps multiple local devices to your single public IP address when communicating across external websites.
4. Client-Side Privacy Guarantee
All network data is queried on-demand directly by your web browser using public API endpoints. MicroToolStack maintains zero server logs and does not record, track, or commercialize your IP address history or lookup queries.
5. Frequently Asked Questions
Why does my IP address change over time?
Most residential internet service providers assign Dynamic IP addresses that rotate periodically or whenever your modem reboots. To maintain a permanent address for server hosting, you must subscribe to a static IP service or configure Dynamic DNS (DDNS).
Can someone find my physical home address from my IP?
No. IP geolocation identifies the geographic location of your ISP's central office, routing facility, or cellular tower (typically within a city or regional radius). It does not reveal your street name, house number, or personal identity.
What is Carrier-Grade NAT (CGNAT)?
CGNAT is a routing mechanism deployed by cellular carriers and modern fiber ISPs where a single public IPv4 address is shared among hundreds of households. If you are behind CGNAT, inbound port forwarding is restricted unless your provider allocates an IPv6 address or dedicated static IPv4.