From October 30, 2026, South Korea raises the character limit for safety-guidance alerts from 90 to 157. That is narrower than saying every disaster alert will become a 157-character message. The Ministry of the Interior and Safety says urgent disaster alerts and critical disaster alerts remain limited to 90 characters, in consideration of the possibility that some older phones cannot receive 157-character messages. The ministry's original Korean-language release PDF is the basis for these distinctions.
Three types, two limits
| Alert type in the announcement | Character limit from October 30 |
|---|---|
| 안전안내문자 — safety-guidance alert | 90 → 157 |
| 긴급재난문자 — urgent disaster alert | 90, unchanged |
| 위급재난문자 — critical disaster alert | 90, unchanged |
The new number is a maximum, not a requirement to fill every safety-guidance alert with 157 characters. The ministry says the old 90-character limit made it difficult to fit a disaster's location, danger, recommended action and evacuation-place information in one alert: senders sometimes condensed information or divided it into multiple messages. A longer allowance permits more detail; it does not certify that a particular message reached a particular device or that every alert's wording will change.
Do not infer an individual alert's official category solely from the length of a message. Read its displayed type, sender, affected area, situation and recommended actions. The press release is not a technical specification for how each handset displays alerts or a new definition of the criteria for issuing each category.
Who can send the expanded safety guidance?
The ministry says use of the expanded allowance moves from local governments to all authorized disaster-alert user agencies, including public bodies. This is a change to the scope of sending agencies alongside the change to the safety-guidance character limit. It does not say that all agencies must send 157-character messages or that urgent and critical alerts may now be 157 characters. Those two categories remain at 90 regardless of the broader agency scope described in the release.
Why the older-phone qualification matters
The ministry says concern about reception on some older phones led it to expand cautiously. Starting in October 2025, it piloted 157-character messages with local governments in stages for about a year. It reports that roughly 48% of the total messages eligible for sending during the pilot were sent as 157-character messages and that no complaints about receiving 157-character messages were filed during that period.
Those are reported pilot observations, not a guarantee across all old handsets and network conditions. We did not test individual devices or confirm that any reader received a message. The same concern about older-phone reception is the ministry's stated reason for retaining the 90-character limit on urgent and critical disaster alerts. Keep the device qualification separate from the category change.
What the 20% reduction does—and does not—measure
A pre-send similar/duplicate review function is also being moved into regular operation. It helps senders check an alert against previously sent content before transmission. According to the ministry, the number of alerts sent during its trial fell from 11,433 to 9,173 compared with the corresponding period a year earlier, or about 20%.
That compares send counts in two periods. It does not mean disaster incidents fell by 20%, establish that every future region will send 20% fewer alerts, or authorize ignoring a new alert that seems familiar. Check the timestamp, location and current instructions even when wording resembles an earlier message.
For a received alert, consider three questions separately: What type is displayed? Which location and action does it describe? When was it sent? The 157-character rule may permit a fuller description in safety guidance, but message length alone is not a measure of urgency or a substitute for the actual instructions.
In short: October 30 changes safety-guidance alerts from a 90- to 157-character limit and extends that capability to more authorized sending agencies. Urgent and critical disaster alerts stay at 90. The approximately 20% reduction refers to the ministry's pilot-period comparison, not a promise about future alerts.
Korean companion on Naver
About the Author
Life Mokcha's editorial team separates the ministry's effective change, pilot observations and individual reception claims.
