XAL Allendale
       54.8617 -2.2147 462.0
       Network: BGS
       Status: Open
       England, United Kingdom
       opened 1983.

XAM (keyword for telegraphic format)
      
       Status: Network/Other

XAN Xi'an (Hsian)
       34.0394 108.9214 630.0
       Network: BJI
       Status: Open
       Shaanxi, China
       IU 19921116-19950528. IC opened 19950529.

XAVN Gruta Xavier
       12.1487 -86.3263 160.0
       Network: INET
       Status: Open
       Nicaragua

XBM (keyword for telegraphic format)
      
       Status: Network/Other

XCM (keyword for telegraphic format)
      
       Status: Network/Other

XDE Dent Fell
       54.5058 -3.4897 291.0
       Network: BGS
       Status: Open
       England, United Kingdom
       opened 1983.

XDM (keyword for telegraphic format)
      
       Status: Network/Other

XIN Xingó
       -9.4483 -37.8364 285.0
       Network: VAO
       Status: Open
       Alagoas, Brazil
       opened 1991.

XIO Khíos Island
       38.2567 26.0408 210.0
       Network: ATH
       Status: Reserved
       Vóreion Aiyaíon, Greece

XLV Seldovia
       59.4547 -151.7217 380.0
       Network: GIA
       Status: Open
       Kenai Peninsula, Alaska, U.S.A.
       opened 1987.

XMAS Kiritimati (Christmas Island)
       2.0448 -157.4453 1.0
       Status: Open
       Kiribati
       opened 19970822.

XMI Christmas Island
       -10.4500 105.6885 261.5
       Network: AUST
       Status: Open
       Christmas Island
       19760927-19771127; reopened 20050628. Coords corrected slightly 20060226.

XMIS Christmas Island
       -10.4807 105.6519 230.0
       Network: AUST
       Status: Open
       Christmas Island
       opened 20050816. BB station.

XMS Christmas Canyon
       35.5233 -117.3547 704.0
       Network: PAS
       Status: Open
       San Bernardino County, California, U.S.A.
       opened 198204. MNLO code XMSC.

xmsc (Local code. See International code XMS.)

XNZR Khunzakh
       42.5417 46.7050 1640.0
       Network: DRS
       Status: Open
       Dagestan, Russia
       opened 19920117.

XOR Xoríkhtion
       39.3661 23.1919 500.0
       Network: THE
       Status: Open
       Thessalía, Greece

XPCP (phase code designation)
      
       Status: Network/Other

XPKP (phase code designation)
      
       Status: Network/Other

XPP (phase code designation)
      
       Status: Network/Other

XRY Khrisí
       34.8748 25.6943 21.0
       Network: ATH
       Status: Open
       Kríti, Greece
       opened 1999?

XSCS (phase code designation)
      
       Status: Network/Other

XSKS (phase code designation)
      
       Status: Network/Other

XSO Sourhope Farm
       55.4925 -2.2511 495.0
       Network: BGS
       Status: Open
       Scotland, United Kingdom
       opened 1983.

XSS (phase code designation)
      
       Status: Network/Other

XSTOP (keyword for telegraphic format)
      
       Status: Network/Other

XTAL
       -0.2020 -78.6688 2040.0
       Network: QUI
       Status: Open
       Ecuador

XTNZ Xhotanan
       39.2800 46.3800 0.0
       Network: NSSP
       Status: Open
       Armenia