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Technical Vocabularynoun · /aɪ piː əˈdres/

IP address

IP address — An IP address is a unique numerical identifier assigned to each device connected to a network, allowing devices to find and communicate with each other.

In simple English

IP stands for Internet Protocol, and every device on the internet or a local network needs one to send and receive data. There are two main versions: IPv4 (like 192.168.1.1) and IPv6 (longer format). In tech companies, you will encounter IP addresses constantly when discussing network infrastructure, debugging connectivity issues, configuring servers, setting up firewalls, or analyzing network traffic. DevOps engineers, network administrators, and backend developers use this term daily. Understanding IP addresses is fundamental for anyone working with cloud services, microservices, or on-premises infrastructure.

How to say it: Say "eye-pee address".

Users want to understand what an IP address is, how it works, and why it matters in networking and web development.

At a glanceCEFR B2
Commonness5/5
Versatility5/5
FormalityCasualFormalNeutral
Spoken ↔ WrittenSpokenWrittenBoth
Directness ↔ DiplomaticDirectDiplomaticDirect
RegionUS and UK

Say it like this

  • What is your IP address?
  • We need to whitelist that IP address.
  • The IP address is already in use.

Use it at work

Access

  • Can you add my IP address to the allowlist?
  • What's the IP address of the server?

Debugging

  • The requests come from one IP address. Maybe a bot.
  • The IP address changed after the restart.

Privacy

  • IP addresses count as personal data under GDPR.
  • We don't store full IP addresses.

Don't say this

✕I need to change my IP address to access the website.
✓I need to configure my IP address to access the internal server.

You do not typically change your IP address just to access a website; you configure it for network access or add it to a whitelist.

Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your colleague asks why the office printer is not working. What do you say?

Complete the sentence

2. We need to _______ the company VPN by adding the new office's _______ to the firewall.

Spot the mistake

3. Which sentence uses IP address incorrectly?

Rewrite naturally

4. Rewrite this in natural tech English: 'The computer on the network has a number that helps other computers find it. This number is made of four groups of numbers separated by dots.'

Say it out loud

Phrase 1 of 3

"What is your IP address?"

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More about IP address

Real examples(3)

  • in a standup

    "We discovered the issue was caused by requests from a blocked IP address, so I unblocked it in the firewall."

  • in a code review

    "This function logs the user's IP address for security purposes, so make sure we're handling it securely."

  • in a team meeting

    "The customer reported that their IP address keeps getting throttled, so we should check if they're on our DDoS protection list."

More mistakes(2)

Handle with care. Non-native speakers sometimes confuse IP address with URL or domain name. IP address is the numerical identifier for a device; domain names are human-readable aliases.

  • ✕The IP address is similar to a URL.
    ✓The IP address is similar to a phone number; the URL or domain name is like a contact name.

    IP addresses and URLs serve different purposes. An IP address is the numeric identifier; a URL is the human-readable web address that resolves to an IP.

  • ✕We should hide the IP address from users.
    ✓We should protect the user's IP address for privacy.

    The phrasing should indicate protecting privacy or masking, not just hiding, which is vague.

Other forms(3)

  • IP address noun

    "The server rejected the request from that IP address."

  • IP addresses (plural) noun

    "We maintain a list of approved IP addresses for our VPN."

  • IP address range adjective modifier

    "The firewall blocks an entire IP address range."

Often used with(6)

  • assign an IP address · Used when a device is given an IP address automatically (via DHCP) or manually
  • whitelist an IP address · Used when you allow an IP address to access a resource
  • block an IP address · Used when you prevent an IP address from accessing a resource
  • IP address range · A group of consecutive IP addresses used for routing or firewall rules
  • static IP address · An IP address that does not change, used for servers
  • dynamic IP address · An IP address that changes, typically assigned to personal devices

Similar words(3)

  • IP · Shortened version; commonly used in tech conversations
  • host address · More formal term; emphasizes the device rather than the network protocol
  • numeric address · Generic term; less common in practice

Opposites(3)

  • domain name
  • hostname
  • URL

Questions(5)

What does IP address mean in software engineering?
An IP address is the unique numerical identifier that identifies a device on a network. It allows devices to locate and communicate with each other. Every device connected to the internet or a local network has an IP address, similar to how every building has a street address.
How do you use IP address in a sentence at work?
Common workplace sentences include: We need to whitelist that IP address, The server is rejecting requests from your IP address, or Can you provide your IP address so we can troubleshoot the connection? You also hear it in contexts like IP address conflict, IP address range, or static IP address.
Is IP address formal or informal?
IP address is neutral and professional. It is used in formal documentation, emails, meetings, and casual conversations equally. The abbreviation IP is common in speech, while the full term IP address appears in both spoken and written contexts.
What is the difference between an IP address and a URL?
An IP address is the numeric identifier for a device (like 192.168.1.1). A URL is a human-readable web address (like https://www.example.com). The URL is resolved to an IP address by DNS so your browser can find the correct server.
What is IPv4 vs IPv6?
IPv4 uses a 32-bit format with four numbers (like 192.168.1.1). IPv6 uses a 128-bit format with longer hexadecimal addresses. IPv6 was created because IPv4 addresses were running out as more devices connected to the internet.
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