Thanks for participating. I append a list of 226 such stations (with Zonal Railway name) having unique station name and station code:-
(Some station codes has changed, old codes are also given)
CODE Station Name ZONE
ADRA Adra SE R
AIT Ait NC...
more...

R
AJIT Ajit NW R
AJNI Ajni C R
AKOT Akot SC R
AKRA Akra E R
ALAI Alai NW R
ALAL Alal N R
ALAU Alau W R
ALER Aler SC R
AMIN Amin N R
AMLA Amla C R
AMLI Amli WC R
AMLO Amlo EC R
AMOD Amod W R
ANAS Anas W R
ANTU Antu N R
APTA Apta C R
ARA Ara EC R
ARAG Arag C R
ARVI Arvi C R
ASAN Asan N R
AHI Ashti C R
ASLU Aslu NW R
ATA Ata NC R
ATRU Atru WC R
ATUL Atul W R
AUNG Aung NC R
AUWA Auwa NW R
BALE Bale C R
BANI BANI (Old Code: VAI) N R
BANI Bani (Old VAI) N R
BANO Bano SE R
BAR Bar NW R
BARH Barh EC R
BARI Bari NC R
BEAS Beas N R
BELA Bela EC R
BENL Benl SW R
BERO Bero SE R
BHUA Bhua NC R
BHUJ Bhuj W R
BINA Bina WC R
BIR Bir WC R
BIRA Bira E R
BOKO Boko NF R
CHAS Chas SE R
DARA Dara WC R
DET Det NW R
DEWA Dewa W R
DING Ding NW R
DIPA Dipa NF R
DISA Disa W R
DIVA Diva C R
DODH Dodh N R
DURG Durg SEC R
DUSI Dusi ECO R
DW DW C R
EKMA EKMA(Old Code: EM) NE R
ETAH Etah NC R
GAUR Gaur NE R
GAYA Gaya EC R
GEDE Gede E R
GHER Gher NC R
GHUM Ghum NF R
GILL Gill (Old GLL) N R
GOLE Gole NW R
GOT Got NE R
GUA Gua SE R
GUMA Guma E R
GUNA Guna WC R
HAPA Hapa W R
HAUR Haur SE R
HER Her SC R
HIND Hind N R
HOL Hol W R
IB Ib SEC R
IDAR Idar W R
IMLI Imli EC R
ITKY Itky SE R
JAIS Jais N R
JARI Jari NW R
JEUR Jeur C R
JHAR Jhar W R
JHIR Jhir NW R
JIND Jind N R
JITE Jite C R
KADI Kadi W R
KASU Kasu C R
KAVI Kavi W R
KAWR Kawr K R
KHAR Khar W R
KHAT Khat SEC R
KHED Khed K R
KHOH Khoh NC R
KIM Kim W R
KITA Kita SE R
KIUL Kiul EC R
KLNG Klng C R
KODI Kodi SC R
KOKA Koka SEC R
KOLE Kole EC R
KONA Kona SE R
KORA Kora W R
KOTA Kota WC R
KOTI Koti N R
KUHI Kuhi SEC R
KUP Kup N R
KURI Kuri S R
LAUL Laul C R
LEDO Ledo NF R
LING Ling C R
LOHA Loha NW R
LONI Loni C R
LUNI Luni NW R
LUSA Lusa NC R
MAEL Mael SE R
MAHE Mahe S R
MAL Mal NF R
MALA Mala NE R
MANA Mana C R
MAU Mau NE R
MAUR Maur N R
MHOW Mhow W R
MOGA Moga N R
MONE Mone SW R
MOR Mor EC R
MOTA Mota NC R
MUPA Mupa NF R
MURI Muri SE R
NANA Nana NW R
NERI Neri N R
NIDI Nidi C R
NILD Nild C R
NIRA Nira C R
NOLI Noli N R
NUA Nua NW R
OD Od W R
ODHA Odha C R
ODUR Odur S R
OEL Oel NE R
OHAN Ohan NC R
OKHA Okha W R
ORAI Orai NC R
ORDI Ordi W R
ORGA Orga SE R
ORKI Orki N R
ORR Orr WC R
PALI Pali NW R
PATA PATA(Old Code: PTX) NC R
PAVI Pavi W R
PEN Pen C R
PGDP Pgdp SC R
POHE Pohe C R
PORA Pora NC R
PUDI Pudi S R
PUNE Pune C R
PURI Puri ECO R
RAHA Raha NF R
RANI Rani NW R
RAS Ras W R
RAU Rau W R
RAY Ray EC R
RAYA Raya NE R
REN Ren NW R
REWA Rewa WC R
RIGA Riga EC R
ROH Roh K R
ROHA Roha C R
RORA Rora NC R
RURA RURA(Old Code: RRH) NC R
SALI Sali NW R
SANK Sank NC R
SELU Selu SC R
SHER Sher Old SH NE R
SIHO Siho EC R
SIKA Sika W R
SINI Sini SE R
SNND Snnd K R
SONI Soni NC R
SORO Soro SE R
SUI Sui NW R
SUKU Suku ECO R
TADA Tada S R
TAKU Taku C R
TALA Tala E R
TALL Tall EC R
TAPA Tapa N R
TATI Tati SE R
TELI Teli S R
TELO Telo EC R
TENI Teni S R
THAL Thal C R
THAM Tham W R
THAN Than W R
TIBI Tibi NW R
TIHU Tihu NF R
TIK Tik N R
TISI Tisi W R
TORI Tori EC R
TULI Tuli NF R
TUNG Tung NF R
TUNI Tuni SC R
TUWA Tuwa W R
TVD Tvd K R
UD Ud K R
UGU Ugu N R
UGWE Ugwe SC R
UMED UMED(Old Code: UMD) NW R
UMRA Umra NW R
UMRI Umri SC R
UNA Una (Gujarat) W R
UNDI Undi SC R
UREN Uren E R
URGA Urga SEC R
URMA Urma SE R
USRA Usra W R
VAPI Vapi W R
VASO Vaso W R
VEER Veer K R
VELI Veli S R
VINA Vina W R
WADI WADI(Old Code: WD) C R
WAIR WAIR(Old Code: WIR) NC R
WANI Wani C R
WENA WENA(Old Code: WEN) EC R