AT&T copper retirement, market by market.
Has stated it intends to exit copper in the majority of its wireline footprint by the end of 2029, with customer upgrades and legacy-service discontinuation underway in portions of its footprint since summer 2026.
Critical Line reads AT&T's public network disclosures continuously and keeps a running index of what it finds. Below is how much of that activity we currently hold, what the pattern looks like from the inside, and what a building owner in the footprint should do about it.
AT&T filings currently held in the Critical Line index. We add to it as new disclosures are published.
Those filings name 21 different states between them.
Every number on this page stands on a filing we located, read, dated and tied to a place. Carriers publish these documents, but they publish them the way a company publishes something it is required to publish: scattered across repositories, inconsistently titled, rarely searchable, and never assembled into anything a building owner could act on.
Assembling them is the work. So we publish the count and the meaning, and we keep the index itself for customers. If you want to know whether a specific address sits inside one of these notices, that is a question we answer for you directly, and it takes minutes.
What this does, and does not, mean.
Carrier transition activity detected in or relevant to this market.
This does not by itself establish that your specific line will be disconnected. A Critical Line Assessment can verify the service and dependency.
Network-change and copper-retirement filings are not the same thing as a service-discontinuance event. What a filing does establish is that the window to identify your dependencies is closing.
- 01Which carriers serve each property, and on what services
- 02Whether any notice names your state, market or wire center
- 03Which critical endpoints ride on the affected services
- 04What deadlines, inspections or rate changes are attached
- 05Which migrations need to happen first, and who must be involved
How AT&T is going about it.
Our reading of the pattern, from the filings we index and the buildings we work in. It describes behaviour, not any particular market.
The exit is a program, not a series of one-offs
AT&T's copper activity does not read like a maintenance decision taken market by market. It reads like a schedule being worked through. The filings arrive steadily rather than in bursts, they use consistent language, and the geography broadens over time rather than concentrating. Practically, that means a market with no activity today is better understood as a market that has not come up yet.
Legacy voice is being closed off before it is switched off
The pattern we see repeatedly is that a service stops being available to order well before it stops working. That gap is comfortable if you are not thinking about it and expensive if you are, because it is the window in which you can still plan a replacement calmly. Once ordering closes, your options narrow to whatever the carrier is selling that day.
The replacement is not always like for like
Where AT&T names a replacement, it is generally an IP or wireless product. Those are fine for a phone on a desk. They behave differently under the conditions that matter for a line in an elevator or a fire panel: a power cut, a failed internet circuit, a device that expects to draw current from the line itself. That difference is the whole reason a critical line needs to be treated as its own project.
What a network change notice actually is.
A network change notice is a carrier telling the industry, in advance, that it intends to stop supporting something. It is a regulatory formality aimed at other carriers, not a letter to you. Understanding its parts is most of the battle.
- It is addressed to competitors, not customers
- The audience is other providers who buy access to the same copper. Nothing in the process requires the carrier to tell the business at the end of the line, and in practice the building owner usually hears later, from an alarm vendor or an elevator inspector.
- It names facilities, not addresses
- A filing describes the plant being retired in the carrier's own vocabulary: wire centers, cable segments, serving areas, switch identifiers. Translating that into a street address is a separate exercise, and it is the one that decides whether a notice matters to you.
- Retirement is not disconnection
- Retiring copper means the carrier stops maintaining a facility and stops accepting orders on it. Discontinuing a service is a different filing with different obligations. Both can end with your line going away, on very different timelines.
- Dates move
- A proposed effective date can be extended, amended or replaced by a later filing. A date you read once is a snapshot, which is why a one-time search is worth much less than a watch.
- Silence is not safety
- No filing naming your market means no filing we have found naming your market. Carriers file continuously, and coverage of any index, including ours, is partial. Absence of a notice is not evidence that your line is safe.
Why reading the notice would not settle it anyway.
Suppose you had the filing in front of you. It would tell you that a carrier intends to retire certain facilities on a certain date. It would not tell you which of your lines ride those facilities, because you do not buy facilities, you buy services, and the mapping between the two is not on your bill.
The lines that matter in a building are usually the ones nobody thinks about: an elevator phone installed by the elevator company, a fire alarm communicator installed by the alarm company, a gate intercom, an emergency phone in a stairwell, a fax line at a nurse station that turns out to carry something else entirely. They are frequently billed under a different account, sometimes to a different entity, occasionally to a tenant who left.
So the useful question is never really "is there a notice?" It is "what do I have, what does it depend on, and what breaks if the copper underneath it goes away?" That question is answered by inventory and testing, not by search.
Is my market affected?
We'll help translate what a notice means for your property.