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10 Best White Null Modem Adapters - May 2026

19M consumers helped this year.

Last Updated: 27-05-2026

1

StarTech.com NM9FF DB9 RS232 Serial Null Modem Adapter, F/F, Null Modem Adapter, DB-9 (F) to DB-9 (F), White

StarTech.com NM9FF DB9 RS232 Serial Null Modem Adapter, F/F, Null Modem Adapter, DB-9 (F) to DB-9 (F), White

StarTech

9.8

9.8

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2

Keple 9 Pin Miniature Male to Female Null Modem Coupler Adapter Converter - Easy to use and install - for DB9 males to DB9 females - Brass body - Nickel plated - Corrosion resistant

Keple 9 Pin Miniature Male to Female Null Modem Coupler Adapter Converter - Easy to use and install - for DB9 males to DB9 females - Brass body - Nickel plated - Corrosion resistant

Keple

9.6

9.6

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3

StarTech.com NM9MF DB9 RS232 Serial Null Modem Adapter, Null Modem Adapter, DB-9 (M) to DB-9 (F)

StarTech.com NM9MF DB9 RS232 Serial Null Modem Adapter, Null Modem Adapter, DB-9 (M) to DB-9 (F)

StarTech

9.5

9.5

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4

kenable 9 Pin Serial Null Modem Adapter RS232 Male Plug to Female Socket Converter

kenable 9 Pin Serial Null Modem Adapter RS232 Male Plug to Female Socket Converter

kenable

9.2

9.2

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5

Pro Signal 9 Pin Mini Null Modem Adaptor Male to Female – Compact RS232 Serial Gender Changer with Gold-Plated Contacts

Pro Signal 9 Pin Mini Null Modem Adaptor Male to Female – Compact RS232 Serial Gender Changer with Gold-Plated Contacts

PROSIGNAL

9.1

9.1

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6

DB9 null modem adapter female to female slimline data transfer serial port adapter 2 Pack

DB9 null modem adapter female to female slimline data transfer serial port adapter 2 Pack

Arnorin

8.8

8.8

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7

Pro Signal 9-Pin Male to Female Mini Null Modem Adapter

Pro Signal 9-Pin Male to Female Mini Null Modem Adapter

Pro Signal

8.6

8.6

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8

DB25 Female / DB25 Female, Mini Null Modem Adaptor

DB25 Female / DB25 Female, Mini Null Modem Adaptor

CableWholesale

8.4

8.4

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9

StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F - DB9 Female to Female - 9 pin RS232 Null Modem Cable - 2 meter, Black (SCNM9FF2MBK)

StarTech.com 2m Black DB9 RS232 Serial Null Modem Cable F/F - DB9 Female to Female - 9 pin RS232 Null Modem Cable - 2 meter, Black (SCNM9FF2MBK)

StarTech

8.2

8.2

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10

InLine Null Modem Cable 9-Pin Female / 2 m Clip

InLine Null Modem Cable 9-Pin Female / 2 m Clip

InLine

8.1

8.1

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