Register or Sign In

1N4558 price and stock

1N4558 Details
My Preferred Distributors (0) Authorized (0) Independent (0) Industrial Supplies / MRO (0)
Register or Sign In to sort your Preferred Distributors to the top of the list!

Authorized Distributors

  • Acme Chip Technology
  • Analog Devices Inc
  • Arrow
  • Avnet Americas
  • Bisco
  • Bürklin Elektronik
  • CDM Electronics
  • Chip 1 Exchange
  • Chip1Stop
  • CHIPMALL.COM LIMITED
  • Coilcraft
  • ComSIT USA
  • DB Roberts
  • DigiKey
  • Dynamic Solutions
  • ElectroCraft
  • Electroshield
  • element14
  • ES Components
  • Fairview Microwave
  • Farnell
  • FDH Electronics
  • Flip Electronics
  • Future Electronics
  • GLYN
  • Heilind Electronics
  • Interstate Connecting
  • Jameco
  • Karl Kruse
  • L-com US
  • Maritex
  • Master Electronics
  • Microchip Technology
  • Mouser
  • NAC
  • New Advantage
  • Newark
  • Onlinecomponents.com
  • Ozdisan Elektronik
  • Pasternack Enterprises
  • PEI Genesis
  • Perfect Parts
  • PolyPhaser
  • Powell Electronics
  • Power & Signal
  • PUI
  • Renesas Electronics America
  • Richardson RFPD
  • Rochester
  • RS
  • Rutronik
  • Sager
  • Samtec
  • SiTime Corporation
  • South Electronics
  • Standard Electric
  • STMicroelectronics
  • Symmetry
  • Techni-Tool
  • TestEquity
  • TME
  • Toby Electronics
  • TTI
  • Venkel Ltd.
  • Verical
  • Waytek, Inc.
  • Wuhan P&S

Independent Distributors

  • Ameya
  • Bristol
  • Chip Stock
  • Chip-Germany GmbH
  • Chip1Cloud
  • Chips Pulse
  • Component Electronics, Inc
  • CoreStaff
  • Direct Components
  • EnteerMall
  • Futuretech Components
  • GlobX GmbH
  • LCSC
  • MacroQuest
  • Neutron USA
  • NexGen Digital
  • Quest
  • SEMIX
  • Sense Electronic
  • Sensible Micro Corp
  • Shengyu Electronics
  • Velocity Electronics
  • VRG Components
  • Vyrian
  • Win Source Electronics
Show Filters
Select Manufacturer
Top of Page ↑

Newark Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558B DISTI # 34AJ0361
Microchip Technology Inc Voltage Regulator To-3 Rohs Compliant: Yes |Microchip 1N4558B Min Qty: 100 Package Multiple: 1 Date Code: 0 Container: Bulk 1N4558B Part Details 0
  • 500 $61.9600
  • 100 $64.4400
$61.9600 / $64.4400 Buy Now 1N4558B Part Details
1N4558A DISTI # 34AJ0360
Microchip Technology Inc Voltage Regulator To-3 Rohs Compliant: Yes |Microchip 1N4558A Min Qty: 100 Package Multiple: 1 Date Code: 0 Container: Bulk 1N4558A Part Details 0
  • 500 $61.9600
  • 100 $64.4400
$61.9600 / $64.4400 Buy Now 1N4558A Part Details
1N4558RB DISTI # 34AJ0362
Microchip Technology Inc Voltage Regulator To-3 Rohs Compliant: Yes |Microchip 1N4558RB Min Qty: 100 Package Multiple: 1 Date Code: 0 Container: Bulk 1N4558RB Part Details 0
  • 500 $61.9600
  • 100 $64.4400
$61.9600 / $64.4400 Buy Now 1N4558RB Part Details
7417-1 DISTI # 01N4558
Brady Worldwide Inc B946 7417-1 Blk/Orange Style 1/Card |Brady 7417-1 Min Qty: 1 Package Multiple: 1 Date Code: 0 Container: Bulk 7417-1 Part Details 0   Buy Now 7417-1 Part Details
Top of Page ↑

DigiKey ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558RB DISTI # 1N4558RB-ND
Microchip Technology Inc DIODE ZENER 4.3V 50W TO204AD Min Qty: 100 Lead time: 35 Weeks Container: Bulk 1N4558RB Part Details Temporarily Out of Stock
  • 100 $64.4400
$64.4400 Buy Now 1N4558RB Part Details
1N4558B DISTI # 1N4558B-ND
Microchip Technology Inc DIODE ZENER 4.3V 50W TO204AD Min Qty: 100 Lead time: 35 Weeks Container: Bulk 1N4558B Part Details Temporarily Out of Stock
  • 100 $64.4400
$64.4400 Buy Now 1N4558B Part Details
1N4558A DISTI # 1N4558A-ND
Microchip Technology Inc DIODE ZENER 4.3V 50W TO204AD Min Qty: 100 Lead time: 35 Weeks Container: Bulk 1N4558A Part Details Temporarily Out of Stock
  • 100 $64.4400
$64.4400 Buy Now 1N4558A Part Details
JAN1N4558B DISTI # JAN1N4558B-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JAN1N4558B Part Details Temporarily Out of Stock   Buy Now JAN1N4558B Part Details
JANTX1N4558RB DISTI # JANTX1N4558RB-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JANTX1N4558RB Part Details Temporarily Out of Stock   Buy Now JANTX1N4558RB Part Details
JANTXV1N4558RB DISTI # JANTXV1N4558RB-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JANTXV1N4558RB Part Details Temporarily Out of Stock   Buy Now JANTXV1N4558RB Part Details
JANTX1N4558B DISTI # JANTX1N4558B-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JANTX1N4558B Part Details Temporarily Out of Stock   Buy Now JANTX1N4558B Part Details
JAN1N4558RB DISTI # JAN1N4558RB-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JAN1N4558RB Part Details Temporarily Out of Stock   Buy Now JAN1N4558RB Part Details
JANTXV1N4558B DISTI # JANTXV1N4558B-ND
Microchip Technology Inc ZENER DIODE Lead time: 35 Weeks Container: Bulk JANTXV1N4558B Part Details Temporarily Out of Stock   Buy Now JANTXV1N4558B Part Details

View all '1N4558' results from DigiKey

Top of Page ↑

Avnet Americas Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558A DISTI # 1N4558A
Microchip Technology Inc Diode Zener Single 4.3V 10% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558A) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558A Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558A Part Details
1N4558B DISTI # 1N4558B
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558B) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558B Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558B Part Details
1N4558RB DISTI # 1N4558RB
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 2-Pin TO-3 Tray - Bulk (Alt: 1N4558RB) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558RB Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558RB Part Details
Top of Page ↑

Mouser Electronics ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558B DISTI # 494-1N4558B
Microchip Technology Inc Zener Diodes Voltage Regulator RoHS: Not Compliant 1N4558B Part Details 0
  • 100 $69.4100
$69.4100 Order Now 1N4558B Part Details
1N4558A DISTI # 494-1N4558A
Microchip Technology Inc Zener Diodes Voltage Regulator RoHS: Not Compliant 1N4558A Part Details 0
  • 100 $69.4100
$69.4100 Order Now 1N4558A Part Details
1N4558RB DISTI # 494-1N4558RB
Microchip Technology Inc Zener Diodes Voltage Regulator RoHS: Not Compliant 1N4558RB Part Details 0
  • 100 $69.4100
$69.4100 Order Now 1N4558RB Part Details
Top of Page ↑

Microchip Technology Inc Manufacturer Direct – Inventory Available for Immediate and Future Delivery

Part # Manufacturer Description Stock Price Price Range Buy
JANTX1N4558B DISTI # JANTX1N4558B
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JANTX1N4558B Part Details 265

Alternates Available
  • 1 $739.6500
$739.6500 Buy Now JANTX1N4558B Part Details
1N4558B DISTI # 1N4558B
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes Min Qty: 1 Package Multiple: 1 1N4558B Part Details 0

Alternates Available
  • 1 $69.4100
$69.4100 Buy Now 1N4558B Part Details
1N4558A DISTI # 1N4558A
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes Min Qty: 1 Package Multiple: 1 1N4558A Part Details 0

Alternates Available
  • 1 $69.4100
$69.4100 Buy Now 1N4558A Part Details
1N4558RB DISTI # 1N4558RB
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes Min Qty: 1 Package Multiple: 1 1N4558RB Part Details 0

Alternates Available
  • 1 $69.4100
$69.4100 Buy Now 1N4558RB Part Details
JAN1N4558B DISTI # JAN1N4558B
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JAN1N4558B Part Details 0

Alternates Available
  • 1 $647.1900
$647.1900 Buy Now JAN1N4558B Part Details
JAN1N4558RB DISTI # JAN1N4558RB
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JAN1N4558RB Part Details 0

Alternates Available
  • 1 $647.1900
$647.1900 Buy Now JAN1N4558RB Part Details
JANTXV1N4558B DISTI # JANTXV1N4558B
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JANTXV1N4558B Part Details 0

Alternates Available
  • 1 $878.3300
$878.3300 Buy Now JANTXV1N4558B Part Details
JANTX1N4558RB DISTI # JANTX1N4558RB
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JANTX1N4558RB Part Details 0

Alternates Available
  • 1 $739.6500
$739.6500 Buy Now JANTX1N4558RB Part Details
JANTXV1N4558RB DISTI # JANTXV1N4558RB
Microchip Technology Inc Voltage Regulator _ TO-3, Projected EOL: 2048-10-03 RoHS: Compliant pbFree: Yes JANTXV1N4558RB Part Details 0

Alternates Available
  • 1 $878.3300
$878.3300 Buy Now JANTXV1N4558RB Part Details

View all '1N4558' results from Microchip Technology Inc

Top of Page ↑

Onlinecomponents.com ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558RB
Microchip Technology Inc   1N4558RB Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558RB Part Details
1N4558A
Microchip Technology Inc   1N4558A Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558A Part Details
1N4558B
Microchip Technology Inc   1N4558B Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558B Part Details
Top of Page ↑

Quest Components  

Part # Manufacturer Description Stock Price Price Range Buy
1N4558
New Jersey Semiconductor Products Inc   1N4558 Part Details 280
  • 242 $63.3200
  • 116 $66.4860
  • 1 $82.3160
$63.3200 / $82.3160 Buy Now 1N4558 Part Details
1N4558A
New Jersey Semiconductor Products Inc   1N4558A Part Details 81
  • 56 $69.6520
  • 27 $72.8180
  • 1 $82.3160
$69.6520 / $82.3160 Buy Now 1N4558A Part Details
1N4558B
New Jersey Semiconductor Products Inc   1N4558B Part Details 208
  • 116 $66.4860
  • 56 $69.6520
  • 1 $82.3160
$66.4860 / $82.3160 Buy Now 1N4558B Part Details
Top of Page ↑

Bristol Electronics  

Part # Manufacturer Description Stock Price Price Range Buy
1N4558
New Jersey Semiconductor Products, Inc.   Min Qty: 1 1N4558 Part Details 350
  • 48 $62.3069
  • 36 $64.2977
  • 23 $67.2154
  • 12 $70.1332
  • 7 $73.0586
  • 1 $75.9840
$62.3069 / $75.9840 Buy Now 1N4558 Part Details
1N4558B
New Jersey Semiconductor Products, Inc.   Min Qty: 1 1N4558B Part Details 261
  • 48 $62.3069
  • 36 $64.2977
  • 23 $67.2154
  • 12 $70.1332
  • 7 $73.0586
  • 1 $75.9840
$62.3069 / $75.9840 Buy Now 1N4558B Part Details
1N4558A
New Jersey Semiconductor Products, Inc.   Min Qty: 1 1N4558A Part Details 102
  • 48 $62.3069
  • 36 $64.2977
  • 23 $67.2154
  • 12 $70.1332
  • 7 $73.0586
  • 1 $75.9840
$62.3069 / $75.9840 Buy Now 1N4558A Part Details
Top of Page ↑

Avnet Americas Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558B DISTI # 1N4558B
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558B) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558B Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558B Part Details
1N4558A DISTI # 1N4558A
Microchip Technology Inc Diode Zener Single 4.3V 10% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558A) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558A Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558A Part Details
1N4558RB DISTI # 1N4558RB
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 2-Pin TO-3 Tray - Bulk (Alt: 1N4558RB) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558RB Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558RB Part Details
Top of Page ↑

ComSIT USA  

Part # Manufacturer Description Stock Price Price Range Buy
1N4558BJANTX
Microwave Semiconductor 50 WATT ZENER DIODE Zener Diode, 4.3V V(Z), 5%, 50W, Silicon, Unidirectional, TO-204AD RoHS: Not Compliant 1N4558BJANTX Part Details Europe - 35   RFQ 1N4558BJANTX Part Details
Top of Page ↑

Avnet Americas Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558B DISTI # 1N4558B
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558B) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558B Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558B Part Details
1N4558A DISTI # 1N4558A
Microchip Technology Inc Diode Zener Single 4.3V 10% 50W 3-Pin(2+Tab) TO-3 - Bulk (Alt: 1N4558A) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558A Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558A Part Details
1N4558RB DISTI # 1N4558RB
Microchip Technology Inc Diode Zener Single 4.3V 5% 50W 2-Pin TO-3 Tray - Bulk (Alt: 1N4558RB) RoHS: Not Compliant Min Qty: 100 Package Multiple: 1 Lead time: 35 Weeks, 0 Days Container: Bulk 1N4558RB Part Details 0
  • 500 $61.9600
  • 100 $64.4400
  • 1 $69.4100
$61.9600 / $69.4100 Buy Now 1N4558RB Part Details
Top of Page ↑

NAC ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
JAN1N4558RB
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 50 Package Multiple: 1 Container: Tray JAN1N4558RB Part Details 0   RFQ JAN1N4558RB Part Details
JANTX1N4558B
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 50 Package Multiple: 1 Container: Tray JANTX1N4558B Part Details 0   RFQ JANTX1N4558B Part Details
1N4558B
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 5 Package Multiple: 1 Container: Tray 1N4558B Part Details 0
  • 1 $70.8100
  • 100 $65.2200
  • 500 $61.9600
  • 800 $60.4500
$60.4500 / $70.8100 Buy Now 1N4558B Part Details
JANTX1N4558B-LOT CHARGE
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTX1N4558B-LOT CHA... Part Details 0   RFQ JANTX1N4558B-LOT CHA... Part Details
JAN1N4558RB-LOT CHARGE
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JAN1N4558RB-LOT CHAR... Part Details 0   RFQ JAN1N4558RB-LOT CHAR... Part Details
JANTX1N4558B-LC
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTX1N4558B-LC Part Details 0   RFQ JANTX1N4558B-LC Part Details
JANTXV1N4558RB-LOT CHARGE
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTXV1N4558RB-LOT C... Part Details 0   RFQ JANTXV1N4558RB-LOT C... Part Details
JANTXV1N4558B
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 50 Package Multiple: 1 Container: Tray JANTXV1N4558B Part Details 0   RFQ JANTXV1N4558B Part Details
JANTXV1N4558B-LOT CHARGE
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTXV1N4558B-LOT CH... Part Details 0   RFQ JANTXV1N4558B-LOT CH... Part Details
1N4558A
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 5 Package Multiple: 1 Container: Tray 1N4558A Part Details 0
  • 1 $70.8100
  • 100 $65.2200
  • 500 $61.9600
  • 800 $60.4500
$60.4500 / $70.8100 Buy Now 1N4558A Part Details
JAN1N4558B-LC
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JAN1N4558B-LC Part Details 0   RFQ JAN1N4558B-LC Part Details
JANTX1N4558RB-LOT CHARGE
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTX1N4558RB-LOT CH... Part Details 0   RFQ JANTX1N4558RB-LOT CH... Part Details
JAN1N4558B
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 50 Package Multiple: 1 Container: Tray JAN1N4558B Part Details 0   RFQ JAN1N4558B Part Details
JANTXV1N4558RB-LC
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 1 Package Multiple: 1 JANTXV1N4558RB-LC Part Details 0   RFQ JANTXV1N4558RB-LC Part Details
JANTX1N4558RB
Microchip Technology Inc Zener Diodes RoHS: Compliant Min Qty: 50 Package Multiple: 1 Container: Tray JANTX1N4558RB Part Details 0   RFQ JANTX1N4558RB Part Details

View all '1N4558' results from NAC

View all '1N4558' results from NAC

Top of Page ↑

NexGen Digital

Part # Manufacturer Description Stock Price Price Range Buy
JANTX1N4558B
Microchip Technology Inc   JANTX1N4558B Part Details 13   RFQ JANTX1N4558B Part Details
Top of Page ↑

Ameya Holding Limited  

Part # Manufacturer Description Stock Price Price Range Buy
JANTX1N4558B
Microchip Technology Inc   JANTX1N4558B Part Details 14   RFQ JANTX1N4558B Part Details
Top of Page ↑

Master Electronics ECIA (NEDA) Member • Authorized Distributor

Part # Manufacturer Description Stock Price Price Range Buy
1N4558RB
Microchip Technology Inc   1N4558RB Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558RB Part Details
1N4558A
Microchip Technology Inc   1N4558A Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558A Part Details
1N4558B
Microchip Technology Inc   1N4558B Part Details 0
  • 100 $61.5300
  • 75 $62.7900
  • 50 $89.2300
  • 25 $168.5400
$61.5300 / $168.5400 Buy Now 1N4558B Part Details

Associated Part Details

Most Popular Zener Diodes

Most Popular Part Numbers