911 service has been restored across North Texas after an "intermittent" region-wide network outage that left as many as 1.6 million people without 911 service.

"The network is back up, however we will continue to monitor before making the decision to return to normal operations. 9-1-1 calls are still being manually routed to the ten digit non-emergency number," the North Central Texas Council of Governments wrote in a Facebook post.

Christy Williams, a spokesperson for the NCTCOG, which includes 15 counties, said in a 2:10 p.m. conference call that the outage was the result of a network failure, not an equipment failure. The outage was isolated to the North Texas network and was "not related to terrorism" or any threat to homeland security.

Anyone experiencing an emergency was urged to call the 10-digit number for their city or county until service was restored. Eventually, calls to 911 were being automatically rerouted to the nonemergency line.

Call-takers are not able to map calls, though, so callers needed to know their exact location.

LIST: Alternate emergency numbers in North Texas, according to the NCTCOG

Around 2:45 p.m., Johnson County Emergency Management was the first to announce that 911 service had been restored and fully functional. NCTCOG's announcement of restored service came less than 30 minutes later.

Williams called Wednesday's outage – the first of its kind in 27 years – "an unwelcome surprise" as the network has multiple failsafes in place to prevent such an occurrence from happening.

During the outage, WFAA collected alternate emergency numbers from official agencies across North Texas. During an outage, it's recommended to check online accounts for local police departments or government agencies for alternate numbers.

Collin County: 972-547-5350

Prosper: 972-569-1035

McKinney: 972-547-2700

Frisco: 972-292-6010

Rockwall County: 972-204-7001 for County/Royse City/McLendon-Chisholm, or 972-771-7724 for Rockwall/Fate/Heath

Sachse: 972-495-2271

Ellis County: 972-825-4903 or 972-825-4950

Midlothian: 972-771-7724

Cleburne: 817-645-0972

Parker County: 817-594-3213

Erath County: 254-965-3338 and 254-965-3318

Waxahachie: 469–309–4400

Red Oak: 972-775-3333

Hood County: 817-573-3307, choose option 2

Johnson County: 817-556-6060, and 911 texting still available

Hunt County: 903-453-6838

Wise County: 940-627-5971, text to 911 also down

Somervell County: 254-897-2242 (Dial 1 for Dispatch)

Farmersville: 972-547-5350