National Interoperability (United States)

Last Updated: December 15, 2023, 20:06 pm UTC

This listing is comprised of the nationally recognized "National Interoperability Field Operations Guide (NIFOG)" frequencies for the United States, as well as the legacy frequencies that have been given new universal nomenclatures.

Many public safety agencies have some or all of these channels available to them. Their use and availability will depend on each agency. These channels may be used for small or wide area incidents and should be monitored during such multiagency incidents. As such, these channels will NOT be in the normal local database listings unless a different squelch tone is in use for the local area.

Many legacy law enforcement, fire and EMS freq's are known by different names throughout the country, but their use is fairly consistent. The channel names listed here, are listed by their new nationally recognized nomenclature, and are not officially part of the NIFOG. For example, a common law enforcement mutual aid frequency of 155.475 has been known as: National, NLEEF, NLER, LERN, LEEN, LEN, etc. It is now known as VLAW31. Even with the new naming, the older names may still persist when monitoring such channels.

Many channels are also setup for repeater operation. Each of those channels have a corresponding direct channel which is the same as the repeater output. Therefore if you hear a mention of 8TAC91D, it is the same output frequency of 8TAC91. Since the output frequency is the same, the channels with the "D" suffix will not be listed separately.

VTAC17 is the same as Marine Channel 25 and may only be used in areas at least 100 miles from a navigable waterway, and by ground stations only.

Please refer to the wiki article for notes regarding the use of CTCSS tones on Low Band, VHF, UHF, and 800 Public Safety Common frequencies.

Frequencies used commonly are also listed in the "public safety" categories. Although they are listed in the official NIFOG documentation, they are not nationwide interoperable frequencies.

As of April 2019, the current NIFOG revision is 1.6.1A. The database is broken down into its NIFOG format for easier readability.

(In the event of a discrepancy in nomenclature or usage, the current NIFOG found at the US Department of Homeland Security, Cybersecurity and Infrastructure Security Agency web page will take precedence).



VHF Low Band
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
39.460 RM 156.7 PL LLAW1/1D LLAW 1 - Law Enforcement FM Interop
39.480 RM 156.7 PL LFIRE2/2D LFIRE 2 - Fire FM Interop
45.860 RM 156.7 PL LLAW3/3D LLAW 3 - Law Enforcement FM Interop
45.880 RM 156.7 PL LFIRE4/4D LFIRE 4 - Fire FM Interop
VHF National Interoperability

136.5 PL is used on the transmit frequencies for mobile repeaters

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.7525 BM 156.7 PL VCALL10 VCALL10 - Calling FMN Interop
151.1375 RM 156.7 PL VTAC11/36 VTAC11/36 - Tactical/Repeater FMN Interop
154.4525 RM 156.7 PL VTAC12/37 VTAC12/37 - Tactical/Repeater FMN Interop
158.7375 RM 156.7 PL VTAC13/38 VTAC13/38 - Tactical/Repeater FMN Interop
159.4725 RM 156.7 PL VTAC14/33 VTAC14/33 - Tactical/Repeater FMN Interop
161.850 RM 156.7 PL VTAC17/17D VTAC17/17D - Repeater/Tactical FMN Interop
158.7375 RM 156.7 PL VTAC34 VTAC34 - Repeater FMN Interop
159.4725 RM 156.7 PL VTAC35 VTAC35 - Repeater FMN Interop
VHF Federal Incident Response Interoperability
IR 6 to IR 9 are the direct channels for 1-5

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
169.5375 RM 167.9 PL NC 1/IR 5 NC 1/IR 5 Incident Calling FMN Interop
170.0125 RM 167.9 PL IR 1/IR 6 IR 1/IR 6 Incident Command FMN Interop
170.4125 RM 167.9 PL IR 2/IR 7 IR 2/IR 7 Medical Evacuation Control FMN Interop
170.6875 RM 167.9 PL IR 3/IR 8 IR 3/IR 8 Logistics Control FMN Interop
173.0375 RM 167.9 PL IR 4/IR 9 IR 4/IR 9 Interagency Convoy FMN Interop
VHF Federal Law Enforcement Interoperability

LE A and LE 6 - LE 9 are direct channels for LE 1-5

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
167.0875 RM 167.9 PL LE 1/LE A LE 1/LE A Tactical/Calling FMN Interop
167.250 RM 68F NAC LE 2/LE 6 LE 2/LE 6 Tactical P25 Interop
167.750 RM 68F NAC LE 3/LE 7 LE 3/LE 7 Tactical P25 Interop
168.1125 RM 68F NAC LE 4/LE 8 LE 4/LE 8 Tactical P25 Interop
168.4625 RM 68F NAC LE 5/LE 9 LE 5/LE 9 Tactical P25 Interop
UHF National Interoperability
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
453.2125 RM 156.7 PL UCALL40/40D UCALL40 - Calling FMN Interop
453.4625 RM 156.7 PL UTAC41/41D UTAC41 - Tactical FMN Interop
453.7125 RM 156.7 PL UTAC42/42D UTAC42 - Tactical FMN Interop
453.8625 RM 156.7 PL UTAC43/43D UTAC43 - Tactical FMN Interop
UHF Federal Incident Response Interoperability
IR 15 is direct for NC 2, IR16-18 are direct for IR 10-12

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
410.2375 RM 167.9 PL NC-2/IR-15 NC2/IR15 - Calling FMN Interop
410.4375 RM 167.9 PL IR-10/IR-16 IR10/IR16 - Ad hoc assignment FMN Interop
410.6375 RM 167.9 PL IR-11/IR-17 IR11/IR17 - Ad hoc assignment FMN Interop
410.8375 RM 167.9 PL IR-12/IR-18 IR12/IR18 - SAR Incident Command FMN Interop
413.1875 BM 167.9 PL IR13 IR13 - Ad hoc assignment FMN Interop
413.2125 BM 167.9 PL IR14 IR14 - Interagency Convoy FMN Interop
UHF Federal Law Enforcement Interoperability
LE 16-18 is direct for LE 10-12

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
414.0375 BM 167.9 PL LE B LE B - Calling FMN Interop
409.9875 RM 167.9 PL LE 10/LE 16 LE10/LE16 - Tactical FMN Interop
410.1875 RM 68F NAC LE 11/LE 17 LE11/LE17 - Tactical P25 Interop
410.6125 RM 68F NAC LE 12/LE 18 LE12/LR18 - Tactical P25 Interop
414.0625 BM 68F NAC LE 13 LE13 - Tactical P25 Interop
414.3125 BM 68F NAC LE 14 LE14 - Tactical P25 Interop
414.3375 BM 68F NAC LE 15 LE15 - Tactical P25 Interop
700 MHz National Interoperability
FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
769.24375 RM 293 NAC 7CALL50/50D 7CALL50 - Primary Calling P25 Interop
769.14375 RM 293 NAC 7TAC51/51D 7TAC51 - General Public Safety P25 Interop
769.64375 RM 293 NAC 7TAC52/52D 7TAC52 - General Public Safety P25 Interop
770.14375 RM 293 NAC 7TAC53/53D 7TAC53 - General Public Safety P25 Interop
770.64375 RM 293 NAC 7TAC54/54D 7TAC54 - General Public Safety P25 Interop
769.74375 RM 293 NAC 7TAC55/55D 7TAC55 - General Public Safety P25 Interop
770.24375 RM 293 NAC 7TAC56/56D 7TAC56 - General Public Safety P25 Interop
770.99375 RM 293 NAC 7GTAC57/57D 7GTAC57 - Other Public Service P25 Interop
770.89375 RM 293 NAC 7MOB59/59D 7MOB59 - Mobile Repeater P25 Interop
770.39375 RM 293 NAC 7LAW61/61D 7LAW61 - Law Enforcement P25 Interop
770.49375 RM 293 NAC 7LAW62/62D 7LAW62 - Law Enforcement P25 Interop
769.89375 RM 293 NAC 7FIRE63/63D 7FIRE63 - Fire P25 Interop
769.99375 RM 293 NAC 7FIRE64/64D 7FIRE64 - Fire P25 Interop
769.39375 RM 293 NAC 7MED65/65D 7MED65 - EMS P25 Interop
769.49375 RM 293 NAC 7MED66/66D 7MED66 - EMS P25 Interop
770.74375 RM 293 NAC 7DATA69/69D 7DATA69 - Mobile Data P25 Interop
773.25625 RM 293 NAC 7CALL70/70D 7CALL70 - Secondary Calling P25 Interop
773.10625 RM 293 NAC 7TAC71/71D 7TAC71 - General Public Safety P25 Interop
773.60625 RM 293 NAC 7TAC72/72D 7TAC72 - General Public Safety P25 Interop
774.10625 RM 293 NAC 7TAC73/73D 7TAC73 - General Public Safety P25 Interop
774.60625 RM 293 NAC 7TAC74/74D 7TAC74 - General Public Safety P25 Interop
773.75625 RM 293 NAC 7TAC75/75D 7TAC75 - General Public Safety P25 Interop
774.25625 RM 293 NAC 7TAC76/76D 7TAC76 - General Public Safety P25 Interop
774.85625 RM 293 NAC 7GTAC77/77D 7GTAC77 - Other Public Service P25 Interop
774.50625 RM 293 NAC 7MOB79/79D 7MOB79 - Mobile Repeater P25 Interop
774.00625 RM 293 NAC 7LAW81/81D 7LAW81 - Law Enforcement P25 Interop
774.35625 RM 293 NAC 7LAW82/82D 7LAW82 - Law Enforcement P25 Interop
773.50625 RM 293 NAC 7FIRE83/83D 7FIRE83 - Fire P25 Interop
773.85625 RM 293 NAC 7FIRE84/84D 7FIRE84 - Fire P25 Interop
773.00625 RM 293 NAC 7MED86/86D 7MED86 - EMS P25 Interop
773.35625 RM 293 NAC 7MED87/87D 7MED87 - EMS P25 Interop
774.75625 RM 293 NAC 7DATA89/89D 7DATA89 - Mobile Data P25 Interop
800 MHz National Mutual Aid

These channels replaced the ICALL/ITAC channels nationwide.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
851.0125 RM 156.7 PL 8CALL90 8CALL90 - Calling FM Interop
851.0125 BM 156.7 PL 8CALL90D 8CALL90 - Calling - Direct FM Interop
851.5125 RM 156.7 PL 8TAC91 8TAC91 - Tactical FM Interop
851.5125 BM 156.7 PL 8TAC91D 8TAC91 - Tactical - Direct FMN Interop
852.0125 RM 156.7 PL 8TAC92 8TAC92 - Tactical FM Interop
852.0125 BM 156.7 PL 8TAC92D 8TAC92 - Tactical - Direct FMN Interop
852.5125 RM 156.7 PL 8TAC93 8TAC93 - Tactical FM Interop
852.5125 BM 156.7 PL 8TAC93D 8TAC93 - Tactical - Direct FMN Interop
853.0125 RM 156.7 PL 8TAC94 8TAC94 - Tactical FM Interop
853.0125 BM 156.7 PL 8TAC94D 8TAC94 - Tactical - Direct FMN Interop

Public Safety Common

VHF Public Safety Mutual Aid Common

These frequencies are not covered by the blanket authorization for nationwide interoperability channels, and a valid FCC license is required for them. Availability is subject to other licensed users in the same area which may be using these frequencies for other purposes (see explanation at the top of the page). CTCSS tone 156.7 is the recommended standard tone, but tones may vary based on local usage.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
155.160 BM 127.3 PL VSAR16 VSAR16 - Search/Rescue FMN Emergency Ops
154.280 BM 156.7 PL VFIRE21 VFIRE21 - Fire FMN Fire-Tac
154.265 BM 156.7 PL VFIRE22 VFIRE22 - Fire FMN Fire-Tac
154.295 BM 156.7 PL VFIRE23 VFIRE23 - Fire FMN Fire-Tac
154.2725 BM 156.7 PL VFIRE24 VFIRE24 - Fire FMN Fire-Tac
154.2875 BM 156.7 PL VFIRE25 VFIRE25 - Fire FMN Fire-Tac
154.3025 BM 156.7 PL VFIRE26 VFIRE26 - Fire FMN Fire-Tac
155.340 BM 156.7 PL VMED28 VMED28 - EMS FMN EMS-Tac
155.3475 BM 156.7 PL VMED29 VMED29 - EMS FMN EMS-Tac
155.475 BM 156.7 PL VLAW31 VLAW31 - Law Enforcement FMN Law Tac
155.4825 BM 156.7 PL VLAW32 VLAW32 - Law Enforcement FMN Law Tac
UHF MED Channels

These frequencies are not covered by the blanket authorization for nationwide interoperability channels, and a valid FCC license is required for them. These are common channels for EMS and hospitals to use for communications. They have also been known to be used for mass casualty incidents. In some areas, organized EMS dispatch centers will use this plan for dispatching and coordinating EMS and hospital resources. PL tone(s) vary by agency and location. Frequencies ending in .xxx5 (12.5 kHz channel centers) must not exceed 11.25 kHz bandwidth (narrowband). Frequencies ending in .xxxx5 (6.25 kHz channel centers) must not exceed 6 kHz bandwidth (ultra-narrowband). Med channels 9/91/92/93, 10/101/102/103 are typically used for dispatching and/or mutual aid. Med 1-10 are the original med channels prior to adding in the 6.25 spaced channels.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
463.000 RM Med-1 Med-1 FMN EMS-Tac
463.025 RM Med-2 Med-2 FMN EMS-Tac
463.050 RM Med-3 Med-3 FMN EMS-Tac
463.075 RM Med-4 Med-4 FMN EMS-Tac
463.100 RM Med-5 Med-5 FMN EMS-Tac
463.125 RM Med-6 Med-6 FMN EMS-Tac
463.150 RM Med-7 Med-7 FMN EMS-Tac
463.175 RM Med-8 Med-8 FMN EMS-Tac
462.950 RM Med-9 Med-9 FMN EMS Dispatch
462.975 RM Med-10 Med-10 FMN EMS Dispatch
463.00625 RM Med-11 Med-11 FMN EMS-Tac
463.0125 RM Med-12 Med-12 FMN EMS-Tac
463.01875 RM Med-13 Med-13 FMN EMS-Tac
463.03125 RM Med-21 Med-21 FMN EMS-Tac
463.0375 RM Med-22 Med-22 FMN EMS-Tac
463.04375 RM Med-23 Med-23 FMN EMS-Tac
463.05625 RM Med-31 Med-31 FMN EMS-Tac
463.0625 RM Med-32 Med-32 FMN EMS-Tac
463.06875 RM Med-33 Med-33 FMN EMS-Tac
463.08125 RM Med-41 Med-41 FMN EMS-Tac
463.0875 RM Med-42 Med-42 FMN EMS-Tac
463.09375 RM Med-43 Med-43 FMN EMS-Tac
463.10625 RM Med-51 Med-51 FMN EMS-Tac
463.1125 RM Med-52 Med-52 FMN EMS-Tac
463.11875 RM Med-53 Med-53 FMN EMS-Tac
463.13125 RM Med-61 Med-61 FMN EMS-Tac
463.1375 RM Med-62 Med-62 FMN EMS-Tac
463.14375 RM Med-63 Med-63 FMN EMS-Tac
463.15625 RM Med-71 Med-71 FMN EMS-Tac
463.1625 RM Med-72 Med-72 FMN EMS-Tac
463.16875 RM Med-73 Med-73 FMN EMS-Tac
463.18125 RM Med-81 Med-81 FMN EMS-Tac
463.1875 RM Med-82 Med-82 FMN EMS-Tac
463.19375 RM Med-83 Med-83 FMN EMS-Tac
462.95625 RM Med-91 Med-91 FMN EMS Dispatch
462.9625 RM Med-92 Med-92 FMN EMS Dispatch
462.96875 BM Med-93 Med-93 FMN EMS Dispatch
462.98125 RM Med-101 Med-101 FMN EMS Dispatch
462.9875 RM Med-102 Med-102 FMN EMS Dispatch
462.99375 RM Med-103 Med-103 FMN EMS Dispatch
700 MHz Deployable Trunked Systems
These channels have been allocated to be used for a field deployed trunked radio system. As listed, the radio/scanner will not track these channels in a normal (trunked) manner and must be scanned conventionally as system ID's and talkgroups will vary on ownership. Channels 5 and 6 are recommended for control channels.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
769.23125 RM 700 DTS 1 Deployable Trunked System 1 P25 Interop
769.38125 RM 700 DTS 2 Deployable Trunked System 2 P25 Interop
769.73125 RM 700 DTS 3 Deployable Trunked System 3 P25 Interop
769.88125 RM 700 DTS 4 Deployable Trunked System 4 P25 Interop
774.51875 RM 700 DTS 5 Deployable Trunked System 5 P25 Interop
774.86875 RM 700 DTS 6 Deployable Trunked System 6 P25 Interop
700 MHz Itinerant

These narrowband low power itinerant channels are designated for low power, on-scene incident response purposes using mobiles and portables by agencies traveling outside their normal coverage area.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
769.05625 RM 156.7 PL 7-US-01 Analog 7-US-01 Analog FMN Multi-Tac
769.05625 RM 293 NAC 7-US-01 Digital 7-US-01 Digital P25 Multi-Tac
769.06875 RM 156.7 PL 7-US-02 Analog 7-US-02 Analog FMN Multi-Tac
769.06875 RM 293 NAC 7-US-02 Digital 7-US-02 Digital P25 Multi-Tac
774.99375 RM 156.7 PL 7-US-03 Analog 7-US-03 Analog FMN Multi-Tac
774.99375 RM 293 NAC 7-US-03 Digital 7-US-03 Digital P25 Multi-Tac
700 MHz Low Power

These narrowband low power channels are subject to regional planning, and may be used for purposes such as on-scene tactical channels or vehicular repeaters.

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
769.00625 M 769.00625 Regional Low power use P25 Multi-Tac
769.01875 M 769.01875 Regional Low power use P25 Multi-Tac
769.03125 M 769.03125 Regional Low power use P25 Multi-Tac
769.04375 M 769.04375 Regional Low power use P25 Multi-Tac
774.93125 M 774.93125 Regional Low power use P25 Multi-Tac
774.94375 M 774.94375 Regional Low power use P25 Multi-Tac
774.95625 M 774.95625 Regional Low power use P25 Multi-Tac
774.96875 M 774.96875 Regional Low power use P25 Multi-Tac
774.98125 M 774.98125 Regional Low power use P25 Multi-Tac
700 MHz Nationwide Air-Ground
These channels are reserved for air-ground communications to be used by low-altitude aircraft and ground based stations

FrequencyLicenseTypeToneAlpha TagDescriptionModeTag
769.13125 RM 293 NAC 7AG58/58D Air - Ground 58/58D P25 Interop
769.63125 RM 293 NAC 7AG60/60D Air - Ground 60/60D P25 Interop
770.13125 RM 293 NAC 7AG67/67D Air - Ground 67/67D P25 Interop
770.63125 RM 293 NAC 7AG68/68D Air - Ground 68/68D P25 Interop
773.11875 RM 293 NAC 7AG78/78D Air - Ground 78/78D P25 Interop
773.61875 RM 293 NAC 7AG80/80D Air - Ground 80/80D P25 Interop
774.11875 RM 293 NAC 7AG85/85D Air - Ground 85/85D P25 Interop
774.61875 RM 293 NAC 7AG88/88D Air - Ground 88/88D (Landing Zone) P25 Interop