Lymph nodes above
the diaphragm

Waldeyer ring
  Tonsils, adenoids   (nasopharynx), lingual tonsils
Cervical[neck] (occipital,   submental, preauricular, submandibular, internal   jugular)
Infraclavicular
Supraclavicular (scalene)
Axillary, pectoral
Mediastinal (peritracheal, thymic region)
Hilar
Epitrochlear, brachial

Lymph nodes below the diaphragm

Upper abdomen (splenic hilar, celiac, porta hepatis)
Lower abdomen (iliac,
  paraaortic,   retroperitoneal,   mesenteric, abdominal, NOS)
Iliac
Inguinal
Femoral
Popliteal
Spleen