PLMN stands for Public Land Mobile Network. It's a 5 or 6 digit code that uniquely identifies a mobile network globally. Every time your phone connects to a tower, it's connecting to a specific PLMN.
Structure
A PLMN code is made of:
- MCC (Mobile Country Code) — 3 digits. UK = 234.
- MNC (Mobile Network Code) — 2 or 3 digits.
UK PLMNs
- EE: 234-30
- O2: 234-10
- Vodafone: 234-15
- Three: 234-20
Why it matters
Multi-network and roaming-capable SIMs use PLMN lists to decide which networks they're allowed to connect to. When you travel, your phone scans for PLMNs your carrier has roaming agreements with. When you're home on a multi-network plan like Fuse, your phone picks the strongest PLMN from the carrier's allowed list.
See also
How PLMN matters when picking a UK mobile plan
Understanding PLMN helps you compare mobile providers on a like-for-like basis. Most consumer mobile pricing pages skip the technical detail — knowing the terminology means you can spot when a plan is genuinely better and when it just sounds that way. The Fuse Mobile glossary keeps definitions short and consumer-focused, no jargon-on-jargon.
Fuse Mobile is a UK multi-network data-only eSIM — it gives your phone access to all four UK mobile networks (EE, Three, Vodafone, O2) through a single profile. Where PLMN is relevant to that setup, it's surfaced explicitly: pricing pages show real numbers, the coverage checker shows live per-network signal, and there's no hidden fee structure. See the plans page for the current pricing or read the multi-network eSIM explainer for the technical detail.