📡
Frequency
457 MHz
Frequency
457 MHz
🧭
Range
451–470 MHz
Range
451–470 MHz
🧩
Band Group
UHF (300–1000 MHz)
Band Group
UHF (300–1000 MHz)
🌐 Summary
The 457 MHz allocation is part of the UHF (300–1000 MHz) spectrum. This range is used worldwide for critical applications that keep our communications and infrastructure running smoothly. On this page we highlight how each band is applied in real systems, from regulatory assignments to everyday devices. Our goal is to make spectrum data clear and practical for engineers, regulators, and enthusiasts alike.
Key uses of this band include: 457 MHz: Business/industrial pool, public safety, utilities; FRS/GMRS in NA; LMR, trunked systems; LMR radios, telemetry, SRD.
UHF land‑mobile radio block (≈450–470 MHz): public safety, utilities, business/industrial systems.
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 0.656 |
| Waveforms | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 16.4 cm |
| Band Family | LMR/Public Safety |
| Band | UHF (Commercial/public safety) |
| Primary Common Name | Land mobile / Fixed, FRS/GMRS in NA |
| FSPL @ 1 km [dB] | 85.638324001397 |
| FSPL @ 10 km [dB] | 105.6383240014 |
| Fresnel Radius @ 1 km (m) | 12.810314498451 |
| Band Group | UHF (300–1000 MHz) |
| Tax Band Family | UHF |
| Tax Band Class | UHF LMR (450–470) |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | Business/industrial pool, public safety, utilities; FRS/GMRS in NA |
| Lower Neighbor Use | UHF (Land mobile + Amateur secondary) |
| Upper Neighbor Use | UHF Broadcast TV (Ch. 14–20) / T‑Band (Region 2) |
| Typical Services Devices | LMR, trunked systems |
| Market Common Devices | LMR radios, telemetry, SRD |
| Refarming Use | No |
| Device Ecosystem Size | Medium (100–1000 models) |
| Device Hotspots (MHz) | 453, 462, 467 |
| Device Category | FRS/GMRS |
| Typical Use Cases | – |
| Modulation (Device) | NFM / 4FSK (DMR), P25 |
| Channel Width (Device) [kHz] | 12.5 |
| Device Region Profiles | Globally used for LMR; country-specific licensing |
| Per-Region EIRP Or Duty (Device) | Licensed LMR: up to tens of watts mobile/base |
| Allocation Relevance (Device) | High (LMR) |
| Adjacent-Band Collision Risks (Device) | Moderate: adjacent-channel in LMR systems |
| Example Devices Or Skus | UHF Land Mobile Radio, Business Radios |
| Common Protocols | Analog FM (12.5 kHz); DMR; P25 (region); TETRA (region) |
🗒️ Notes
| Field | Value |
|---|---|
| Receiver Selectivity Notes | ≥60 dB @ ±12.5 kHz |
| Interference Notes | Narrowbanding; regional channel plans |
| Compatibility Risk Notes | – |
| Notes | UHF land‑mobile radio block (≈450–470 MHz): public safety, utilities, business/industrial systems. |
| Propagation Notes | Strong coverage, good indoor penetration |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 451 |
| Upper Band Frequency Limit | 470 |
| EIRP Indoor Limits | N/A (licensed; verify national rules) |
| EIRP Outdoor Limits | N/A (licensed; verify national rules) |
| PSD Limit | — |
| Emission Mask Class | LMR 12.5 kHz NB |
| Guardband Minimum [kHz] | 12.5 |
| Typical Bandwidths | 11–20 kHz |
| Autocalculated Bandlimits | No |
| Typical Bandwidths (Estimated) | 11–20 kHz |
| Max EIRP [dBm] | Licensed LMR: up to tens of watts mobile/base |
| Power Source Or Duty Profile (Typical) | – |
| Channelization Plan | 12.5, 25 kHz |
| Channelization | – |
| Guard Band Requirement | – |
| OOB Emission Limit [dBm/MHz] | -13 (baseline) |
| Spurious Emission Limit (dBm) | -30 (baseline) |
| RX Blocking Min [dBm] | -15 (planning) |
| Duplexing | Half-duplex |
| Duplexing Information | Simplex or paired |
| Uplink Pairing | – |
| Downlink Pairing | – |
| Paired Band Info | – |
| Max EIRP [dBm] | – |
| Channelization Block Size | 12.5 / 25 kHz channels |
| 3GPP Band Number | |
| Example 3GPP Bands | – |
| LTE Uplink Bands | Band 31 |
| LTE Downlink Bands | – |
| NR Uplink Bands | – |
| NR Downlink Bands | – |
| Guard Bands | Narrow guard bands |
| Protocol Or Standard | – |
🌎 Country Overrides
| Field | Value |
|---|---|
| Tax Service Category | Other / Various |
| Tax License Type | Licensed / Service-Specific |
| Tax Regions | Global / Varies |
| ITU Region 1 | Land mobile, Fixed |
| ITU Region 2 | Land mobile, Fixed |
| ITU Region 3 | Land mobile, Fixed |
| License Type | Licensed land mobile / fixed; FRS/GMRS sub-allocations |
| Primary Application | Business/industrial pool, public safety, utilities; FRS/GMRS in NA |
| Primary Services | – |
| Spurious Emission [dBm] | -30 (baseline) |
| Lower Neighbor Use | UHF (Land mobile + Amateur secondary) |
| Upper Neighbor Use | UHF Broadcast TV (Ch. 14–20) / T‑Band (Region 2) |
| Licensing Model | Licensed (Land mobile) |
| Typical Services Devices | LMR, trunked systems |
| US FCC Alloc | -– |
| CA IC Alloc | -– |
| UK Ofcom Alloc | -– |
| US Ref | 47 CFR Part 90 (Private Land Mobile) |
| Typical Bandwidths | 11–20 kHz |
| Market Licensing Model | Licensed (LMR/Gov) |
| Market Common Devices | LMR radios, telemetry, SRD |
| Fresnel Radius (1st, 1 km) [m] | 12.810314498451 |
| Typical Bandwidths (Estimated) | 11–20 kHz |
| Auction Status | – |
| Refarming Use | No |
| Typical Site Spacing km | 4 / 12 |
| Device Ecosystem Size | Medium (100–1000 models) |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Device Hotspots (MHz) | 453, 462, 467 |
| Device Category | FRS/GMRS |
| Typical Use Cases | – |
| Typical Center Frequencies [MHz] | – |
| Rule Part (Fcc Or Region) | – |
| Modulation (Device) | NFM / 4FSK (DMR), P25 |
| Channel Width (Device) [kHz] | 12.5 |
| Device Region Profiles | Globally used for LMR; country-specific licensing |
| Per-Region EIRP Or Duty (Device) | Licensed LMR: up to tens of watts mobile/base |
| Allocation Relevance (Device) | High (LMR) |
| Adjacent-Band Collision Risks (Device) | Moderate: adjacent-channel in LMR systems |
| Example Devices Or Skus | UHF Land Mobile Radio, Business Radios |
| Antenna Form Factor (Typical) | ¼-wave ≈ 16.4 cm |
| Power Source Or Duty Profile (Typical) | – |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 451 |
| Upper Band Frequency Limit | 470 |
| Rx Blocking Min dBm | -15 (planning) |
| Lower Neighbor Use | UHF (Land mobile + Amateur secondary) |
| Upper Neighbor Use | UHF Broadcast TV (Ch. 14–20) / T‑Band (Region 2) |
| Lower Neighbor Band | UHF (Land mobile + Amateur secondary) |
| Lower Neighbor Range | 447.000–450.000 MHz |
| Upper Neighbor Label | UHF Broadcast TV (Ch. 14–20) / T‑Band (Region 2) |
| Upper Neighbor Range | 471.000–512.000 MHz |
| Adjacent-Band Collision Risks (Device) | Moderate: adjacent-channel in LMR systems |
| Real-World Range (Indoor/Outdoor) | – |
| US FCC Alloc | — |
| CA IC Alloc | — |
| UK Ofcom Alloc | — |
| Regulatory References | US: 47 CFR Part 90 (Private Land Mobile); CA: ISED RSS‑119 (Land Mobile 27.41–960 MHz); UK: Ofcom PMR/Business Radio (UK FAT) |
| Global Harmonization | Regional |
| Crossborder Coordination | High |
| Sharing Mechanism | – |
| Auction Status | – |
| Guard Or Pair | – |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | -110 dBm (est.) |
| Interference Cases | – |
| Lower Neighbor Range | 447.000–450.000 MHz |
| Upper Neighbor Range | 471.000–512.000 MHz |
| Interference Notes | Narrowbanding; regional channel plans |
| Market Licensing Model | Licensed (LMR/Gov) |
| Market Commercial Value | Medium |
| Market Common Devices | LMR radios, telemetry, SRD |
| Market Deployment Density | Dense in metro, low in rural |
| Noise Floor (Estimated) | -110 dBm (est.) |
| Market Commercial Value (Estimated) | Medium |
| Ecosystem Maturity | Emerging |
| Indoor Penetration | Good |
| Known Interference | No major interference issues noted |
| Device Ecosystem Size | Medium (100–1000 models) |
| Real-World Range (Indoor/Outdoor) | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 16.4 cm |
| Ecosystem Maturity | Emerging |
| Device Ecosystem Size | Medium (100–1000 models) |
| Chipset Availability | Specialized vendors (Motorola, Airbus) |
| Operator Deployments | Regional/national public safety agencies |
| Technology Generations Deployed | LMR / TETRA digital voice |
| Roaming Support | No |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Indoor Penetration | Good |
| Known Interference | No major interference issues noted |
| Occupancy | Medium |
| Occupancy Bucket Pct | 10–30% |
| Latency Profile | – |
| Common Channels Or Profiles | – |
| Security Features | – |
| Lbt Or Fhss Requirement | – |
| Popularity (Installed Base) | – |
| Coexistence Tips | – |
| Latency Class | – |
| Device Hotspots (Scoped && Tagged) | – |
